U6重点词汇精讲1.agriculture (n) 农业，农艺例句：Modern agriculture is destroying our beautiful countryside.现代农业正在破坏我们美丽的农村。
【拓展】(1)agricultural (a) 农业的词组：agricultural products 农产品agricultural development 农业发展2.farm (v) 耕种例句：The family has farmed there for generations. 这家世代都在那里务农。
(n) 农场词组：live/work on the farm 在农场生活/工作例句：I live in the city now, but I used to live on the farm.我现在城市生活，但是我曾经在农场生活。
【拓展】(1)farming (n) 农业例句：Farming depends on the weather. 农业取决于天气。
(2)farmer (n) 农夫3.nature (n) 大自然，自然界词组：by nature 天生的，天性的例句：She is kind by nature 她生性善良。
【拓展】(1)natural (adj) 自然的例句：This feeling seems to be natural. 这种感触看起来似乎是自然的。
Coal and oil are natural products. 煤和石油是天然物产。
(2)naturalist (n) 博物学家4.zone (n) 时区，地带词组：industrial zone 工业区North/South temperate zones 北/南温带parking zone 停车场5.mixture (n) 混合物词组：a mixture of … and ……和…的混合物例句：We listened to the news with a mixture of surprise and pleasure.我们怀着惊喜交加的心情收听了这则新闻。
【拓展】(1)mix (v) 混合词组：mix sth with sth 把…和…混合例句：Mix the oil with the vinegar and shake the bottle. 把油和醋混合然后摇晃瓶子。
(2)mixed (adj)例句：I had mixed feelings about meeting him again. 对于再见到他，我心情很复杂。
6.fertilizer (n) 化肥例句：Farmers use fertilizers to fertilize the soil. 农民用化肥来使土壤肥沃。
【拓展】(1)fertile (a) 肥沃的fertilization (n) 施肥例句：Fertilization can make the soil fertile. 施肥可以让土壤变得肥沃。
7.experimental (adj) 实验性的例句：Sunqiao is an experimental research facility. 孙桥是一个实验研究基地。
【拓展】(1)experiment (n) 实验词组：conduct an experiment on 在…上做实验carry out an experiment with 用…来做实验例句：Have they ever conducted an experiment on a large number of patients?他们是否在大量的病人身上做过实验？He is carrying out an experiment with new drugs to cure the disease.他正在用新的药做实验来治疗这种病。
（v）进行实验词组：experiment on 在…上做实验experiment with 用…来做实验例句：Have they ever experimented on a large number of patients?他们是否在大量的病人身上做过实验？He is experimenting with new drugs to cure the disease.他正在用新药做实验来治疗这种病。
8.involve (v) 牵涉，包含词组：involve doing 需要，包含involve sb in sth 使某人介入某事sb be involved in sth 某人背卷入某事例句：The job involves traveling abroad for three months each year.这份工作需要每年去国外三个月。
Don’t involve me in your quarrel.别把我牵扯到你们的争吵中。
I’m not involved in your quarrel.我没有介入你们得争吵中。
9.profitable (adj) 有利的，有收益的词组：a profitable enterprise 一家盈利的企业【拓展】(1)profit (n) 利润词组：at a profit 获利make a profit 获利例句：We hoped to sell the goods at a profit. 我们希望卖掉这些产品能有所获益。
He made a profit of fifty thousand. 他卖掉房子获利5万元。
(v) 获利，有益于例句：Tell ing lies won’t profit you.说谎将对你无益。
We profit from lots of reading. 我们从阅读中获得很多。
(2)unprofitable (adj) 无益的，非盈利的例句：It would be unprofitable to pursue this argument any further.再就这点争论下去将是无益的。
10.prove (v) 证明，证实词组：prove sb/sth （to be）+ adj 证明是prove （to be）+ adj 证明是例句：They prove her (to be) guilty. 他们证明她有罪。
His story proved (to be) false. 他的故事被证明是假的。
【拓展】(1)proof (n) 证据词组：in proof of 以证明例句：In proof of this theory, I will make some studies.我将做一些研究来证明这个理论。
11.variety (n) 种类变化，多样化词组：a variety of 各种各样的…例句：Students come from a variety of different backgrounds. 学生们的出生背景各异。
【拓展】(1)various (adj) 不同的，各种各样的例句：There are various dishes on the menu. 菜单上有各种各样的菜。
(2)vary (v) 改变，变化词组：vary from person to person 因人而异例句：The attitude of study varies from person to person. 学习态度因人而异。
12.economic (adj) 经济的词组：economic reforms 经济改革economic growth 经济增长economic policy 经济政策economic development 经济发展【拓展】(1)economy (n) 经济例句：economy class 经济舱China’s economy has developed rapidly in rapidly in recent years.中国经济在最近几年增长非常迅速。
(2)economics (n) 经济学例句：Economics is subject to study money and goods.经济学是一门研究钱和商品的学科。
(3)economical (adj) 节约的词组：be economical of 节俭的例句：You should be economical of your time. 你应该节约你的时间。
13.benefit (v) 有益于词组：benefit from 收益，获益例句：Who’s mostly likely to benefit from the old lady’s death?谁最有可能因那老妇人的死而获益？(n) 利益，恩惠词组：be of great benefit to sb 对某人很有帮助for the benefit of 为了…的利益例句：The book is of great benefit to sb.这本书对你很有帮助。
It was for the benefit of your company that we did that.我们这样做都是为了你们公司的利益。
【拓展】(1)beneficial (adj) 有益的词组：be beneficial to 对…有益的例句：Sunshine is beneficial to health. 阳光对健康有益。
14.backward (adj) 向后的例句：She went without a backward glance. 她头也不回地走了。
（adv）向后例句：She jumped backward. 她向后跳。
【拓展】forward (adj) 向前的（adv）向前upward (adj) 向上的（adv）向上downward (adj) 向下的（adv）向下15.amazed (adj) 惊讶的词组：be amazed at 对…吃惊be amazed to do sth 惊讶地做某事例句：I am amazed at his conduct. 我对他的行为感到惊讶。
I was amazed to find her there. 我惊讶地发现她在这里。
【拓展】(1)amazing (adj) 令人惊讶地例句：I am amazed at the amazing news. 我对这一惊人的消息感到惊讶。
(2)amazement (n) 惊异词组：to one’s amazement 令人吃惊的是例句：To my amazement, she died last week. 她上个礼拜死了，令我很吃惊。