1. To order, specify description and extension length from center line of valve to top of handwheel or nut. 订购时，注明描述信息和从阀门中心线至手轮顶部或螺母的加长长度尺寸。
2. The assessment results can be references for the government to enact the development plan of CCT and extension policy. 根据评价结果可以为政府制定洁净煤技术发展规划和推广政策提供决策参考。
3. As an extension and supplement to the ground road system the underground road system will play more and more important role in city development. 作为地面道路系统的延伸和补充，地下道路系统也将随着城市的不断发展发挥越来越重要的作用。
英英解释
n.
1. a mutually agreed delay in the date set for the completion of a job or payment of a debt
2. act of expanding in scope; making more widely available
3. the spreading of something (a belief or practice) into new regions
4. an educational opportunity provided by colleges and universities to people who not enrolled as regul
5. act of stretching or straightening out a flexed limb
6. a string of characters beginning with a period and followed by one to three letters; the optional se
7. the most direct or specific meaning of a word or expression; the class of objects that an expression
8. the ability to raise the working leg high in the air
9. amount or degree or range to which something extends
10. an additional telephone set that is connected to the same telephone line
11. an addition to the length of something
12. an addition that extends a main building
