1. a few times
几次
2. all the time
总是
3. almost always
几乎总是
4. almost never
几乎不
5. at times
有时，偶尔
6. constantly
经常
7. every hour
每小时
8. every now and then
不时地，常常
9. every third day
每三天
10. four times
四次
11. frequently
经常
12. hardly ever
几乎不
13. nearly always
几乎总是
14. now and then
偶尔，有时
15. off and on
断断续续地，时不时地
16. on the fifteenth of every month
每个月十五号
17. once in a blue moon
千载难逢，极为罕见
18. once in a while
偶尔，有时
19. three times a week
每周三次
20. twice a month
每个月两次
加载中,请稍侯......
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