知道某数

1. 知道...的确切数目：keep at 不息地做 | keep count of 知道. . . 的确切数目 | keep out 抵御

2. 数数目：keep company with 结交 | keep count of 数数目 | keep down 控制

3. 计数,统计总数：keep clear of%[]%避开% | keep count of%[]%计数,统计总数% | keep doing sth.%[]%继续做某事%

4. 计数,数得清：Keep the room clear of these flies? 把这些苍蝇从屋中赶走. | keep count of计数,数得清: | We can't keep count of stars in the sky. 我们数不清天上的星星.