roller chain的用法和样例：
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.
通过对试验数据的分析，得出了提高高速滚子链的使用性能以及如何使高速滚子链本身性能提高的结论。 - It turns out that one type of gluon chain behaves in the four-dimensional spacetime as the graviton, the fundamental quantum particle of gravity.
我们发现了一类胶子链，在四维时空中的行为就和重力子一样，重力子是重力现象的基本量子。
