English For Biomedical Engineering
UNIT 4 Biomaterials
目录 contents
1、 Text: Biomaterials 2、 Listening: Biomaterials 3、 Writing: Article 4、 Speaking: Conference Presentation
Chromium n.铬 trace element 微量元素
metallic n.金属的
Text: Biomaterials
A second difference is in the way that materials are actually made. Whereas the engineer takes a “top-down” approach, selecting a material to fabricate a part according to an established goal and an exact design plan, natural structures develop in the opposite way (that is, “bottom up”). Both the material and the whole organism (a plant or an animal) grow according to the principles of biologically controlled self-assembly.
hierarchical structure 层次结构
Text: Biomaterials
Nature has always been a source of inspiration for technical developments, but only in recent years have materials scientists started to consider the complex hierarchical structure of natural materials as a model for the development of new types of highperformance engineering materials. It is by no means obvious how the lessons learned from biological materials can be applied to the design of new engineering materials.
Chromium n.铬 trace element 微量元素
metallic n.金属的
ቤተ መጻሕፍቲ ባይዱ
Text: Biomaterials
The reasons for this difficulty are some striking differences in the design strategies that are common in engineering and the ways in which natural materials are constructed. First, the choice of elements is by far greater for the engineer. Elements such as iron, chromium and nickel are only trace elements in biological tissues and are not used in metallic form, in contrast to their use in different types of steel, for example.
hierarchical structure 层次结构
Text: Biomaterials
The reasons for this difficulty are some striking differences in the design strategies that are common in engineering and the ways in which natural materials are constructed. First, the choice of elements is by far greater for the engineer. Elements such as iron, chromium and nickel are only trace elements in biological tissues and are not used in metallic form, in contrast to their use in different types of steel, for example.
Text: Biomaterials
Nature has always been a source of inspiration for technical developments, but only in recent years have materials scientists started to consider the complex hierarchical structure of natural materials as a model for the development of new types of highperformance engineering materials. It is by no means obvious how the lessons learned from biological materials can be applied to the design of new engineering materials.