1) keep in constant touch; make frequent contacts with
常川往来
2) She was always coming backwards and forwards.
她经常来来往往。
3) current account
经常账;往来账
4) She came later than usual.
她比往常来得晚。
5) keep up a regular correspondence
常有书信往来
补充资料：来来
1.以来。 2.由来。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条