Commutation tables

commutation [[ˌkɔmju(:)'teiʃən]]

n. 交换, 变换, 代替\\n[电] 整流

tables

n. 桌子；附录；表格（table的复数）

What kind of performance are you looking for?

你要什么配置的机器。

Who rang the bell a while ago?

刚才谁在按门铃？

Other books are for reading slowly and carefully. If it is a book on a subject that you are interested in, you will want to chew and digest it. That does not mean reading it too slowly. When you pick up a book for the first time, check that it is not to

还有一些书是要慢慢地、仔细地阅读的。如果有一本书谈论的题目你很感兴趣，你就想“咀嚼、消化它”。这并不意味着要读得太慢。当你第一次拿起一本书的时候，你得检查一下，这本书不是太难读。除非从头几页书中你能看出这是一本你容易读懂的书，否则你就不要去读它。