第1个回答 2009-09-06
每周两次 twice a week
每周三次 three times a week
每周四次 four times a week
一次两次用once twice
三次以上就用 (three) times
第2个回答 2009-09-06
twice/three times/four times every week.
第3个回答 2009-09-06
twice a week 2次
three times a week 3次
four times a week 4次
n times a week n次
第4个回答 2009-09-06
twice a week or three times a week or four times a week