Unit 1Urban forestry involves (refers to / is concerned with) forestry activities introducing forestry from wild lands (fields) and countryside (rural regions) to populous cities where economy, culture, industry and business (commerce) are concentrated. Most metropolitan cities are currently prosperous but noisy (clamorous) with deteriorating ecological environment. People living in such a crowded and narrow city space suffer from a worsening (declining) physical quality. To develop urban forestry can beautify environment, purify air, reduce noise and adjust local climate (microclimate), so that the living quality of urban people can be improved. Generally, urban forestry has provided a new approach to the urban environmental problems.Unit 2With the development of economy and progress of civilization in human society, there have been significant transformations in both people’s understanding about forests and social demands for forestry. As a result, more world attention has been widely paid to the function that forests play to maintain and improve ecological environment (the role that forests play in maintaining and improving ecological environment has drawn worldwide attention.). In 1992, UN Conference on Environment and Development bestowed priority on forestry (gave priority to forestry) and it became a political commitment (promise) of the highest rank. In addition, it was particularly emphasized in the meeting that nothing would be more important than forestry among the problems that the world summits dealt with. It is a distinct milestone in world civilization history to place forestry issues at such an unprecedentedly high position.Unit 3China is one of the countries boasting the richest biodiversity and also one of the earliest adopting the Convention on Biological Diversity. The Chinese Government has highly valued the work of biodiversity conservation by formulating and enforcing a series of related laws and regulations，so that a legal system on the conservation and biodiversity has fundamentally formed. In addition, it has established and consolidated the coordination mechanism on the implementation of the Convention on Biological Diversity as well as the scheme of Inter-ministerial Joint Meeting on biological species resources, laid down and issued the National Action Plan on the Conservation of Biodiversity of China and other related plans in this regard,based on which various relevant sectors have mapped out and executed their own action plans. Unit 5Agriculture still has /(shoulders / takes) the responsibility to feed the entire world in spite of / (despite) the serious (tough / big /severe ) challenge of climate change. Agriculture needs to produce more food, waste less, and make it easier for farmers to have their produce sent / (get their produce) to consumers. Besides, agriculture has to find ways/approaches/methods to reduce negative impacts resulted from environmental change—including lowering greenhouse gas emissions，planning/managing food security and rural development as a whole, etc. Only through the development of agricultural high technology can the above be realized/All these are only possible through the development of agricultural high technology.Unit 6Chinese agriculture has to choose the way of a low-carbon development which is characterized by being resources-saving, production-clean, environment-friendly and quality-efficiency-oriented. Therefore, in terms of technology, great efforts must be made to develop a series of key technologies and promote /spread their practical application, such as resources-saving technologies including energy-saving, soil-saving, water-saving, fertilizer-saving, insecticides-saving / pesticides-saving, seeds-saving, materials-saving and labor-saving technologies, and so on, technologies of reducing the use of agricultural chemicals and developing their substitutes, technologies of cultivating new plant species with high light absorption and carbon sequestration, technology of soil carbon sequestration, technologies of developing clean energies, technologies of developing clean environment-friendly production, technologies of poison-free disposal and reclamation of wastes, and so on.Unit 7The enactment of the City Planning Act in 1989 is a major milestone to re-establish and formalize (regularize) the urban planning system in China. But, there are still many deficiencies of the urban planning system in coping with the rapidly changing socio-economic environment. Some of these deficiencies can be traced back to the past planned economy era, and some are intrinsic problems of the City Planning Act. Attempts are being made (Experiments are taking place) in Chinese cities which aim to provide better guidance and supervision to urban planningand development control from a planned economy to a transitional one.Unit 8Currently, we could hardly live a single day without seeing a celebrity spokesperson promoting a product or a social campaign on TV, net or other media. This is an intensely popular trend that we cannot fail to notice. There is no doubt that the celebrity spokespeople could boost the sale of a product. A host of celebrity spokespersons, however, have emerged as the marketing tool of some companies, even companies producing and selling fake and inferior items. This kind of behavior has produced negative impacts on consumers and whole society, which should be severely criticized and penalized. Of course, as is known to all, everything has both bright and dark sides. Some sta rs’ endorsement of social activities and public campaigns raises public awareness, giving rise to changes in public behavior. In this case, they serve as positive role models of the general public. To name only one case: Pu CX, a household figure, acting as the celebrity spokesman of the China AIDS Foundation, contributes greatly to the cause of AIDS prevention and cure in China.Unit 9Famed for Oriental Venice, Suzhou tops all others cities in both the number and the artistry of gardens. Tracing back to the Spring and Autumn period, the earliest gardens in Suzhou belongs to the king of Wu. Recorded as the earliest private garden, Pijiang house dates from the 4th century Eastern Jin Dynasties. Following that, Suzhou's art of gardening has undergone a history of 1, 500 years. Originated from the desire to feel the charm of mountains, forest and springs without going out of the noisy surrounding of the town, Suzhou gardens are the harmonious combination of nature and constructions. During the prosperous Ming and Qing Dynasties, the number of gardens in the city increases a great deal, mounting to 200 odd. Dozens of them have survived to the present and are in a good state of preservation. Among them, the most famous ones are the Surging Waves Pavilion, the Lion Grove Garden, the Humble Administrator Garden and the Lingering Garden, representing the different styles of Song, Yuan, Ming and Qing Dynasties respectively.Unit 10In the northern ocean there is a fish, called the kun, I do not know how many thousand li insize. This kun changes into a bird, called the peng. Its back is I do not know how many thousand li in breadth. When it is moved, it flies, its wings obscuring the sky like clouds.When on a voyage, this bird prepares to start for the Southern Ocean, the Celestial Lake. And in the Records of Marvels we read that when the peng flies southwards, the water is smitten for a space of three thousand li around, while the bird itself mounts upon a great wind to a height of ninety thousand li, for a flight of six months' duration.There mounting aloft, the bird saw the moving white mists of spring, the dust-clouds, and the living things blowing their breaths among them. It wondered whether the blue of the sky was its real color, or only the result of distance without end, and saw that the things on earth appeared the same to it.If there is not sufficient depth, water will not float large ships. Upset a cupful into a hole in the yard, and a mustard-seed will be your boat. Try to float the cup, and it will be grounded, due to the disproportion between water and vessel. So with air. If there is not sufficient a depth, it cannot support large wings. And for this bird, a depth of ninety thousand li is necessary to bear it up. Then, gliding upon the wind, with nothing save the clear sky above, and no obstacles in the way, it starts upon its journey to the south.。