roller chain的用法和樣例：
例句
- It is also known why high-speed roller chain has better perfo rmance.It gives some information to raise performance of roller chain made in ch ina.
通過(guò)對試驗數據的分析，得出了提高高速滾子鏈的使用性能以及如何使高速滾子鏈本身性能提高的結論。 - It turns out that one type of gluon chain behaves in the four-dimensional spacetime as the graviton, the fundamental quantum particle of gravity.
我們發(fā)現了一類(lèi)膠子鏈，在四維時(shí)空中的行為就和重力子一樣，重力子是重力現象的基本量子。
