往来的英文：
dealings
contacts
go back and forth

Inter-bank transactions
同业往来

open account (OA)
仍在往来的帐户

The nicety of a diplomatic exchange.
外交往来的谨慎

I am a speculator in rarities, and I have dealings with persons interested in numismatics all over the world
我是做精品生意的商人，我和全世界各地热衷钱币收藏的人们有生意往来。

To break off intercourse
屏绝往来

I had formed a casual acquaintance with him
他同他小有往来。

Promote sportsmanship and international exchanges.
弘扬体育精神,促进国际往来。

The ferryboats ply across the Channel
这些渡船定时往来英吉利海峡。

overdraft on current account unsecured
无抵押往来帐透支

Handle all the domestic and foreign business fund transactions
可办理国内外一切资金往来业务

Democrats usually do. They deal with labor, they deal with people.
民主党人通常都是这样的。民主党人和劳工打交道，和人民打交道。

To administer or deal out.
管理；分配

repeat an order, a deal
再次供应同样一批货、 一笔交易.

Of a selector, a moving contact that engages with the contacts of a bank.
与存储单元的触点相啮合的选择器滑动触点。

If someday I will not contact you, will you contact firstly and initiatively?
如果有一天我不再和你联系，你会主动跟我联系吗？

He have many contact in the city.
他在城里有不少熟人。

Stand back to back!
背靠背站好！

They are on the back of the menu.
它们在菜单背面。

Our seats on the train were back to back.
我们在火车上的坐位是背靠背的。