between 
英 [bɪˈtwiːn]  美 [biˈtwin] 
adv. 在中间

prep. 在...之间；私下；来往于…之间；由…分担（分享）；总共

例句：
He was sitting between two old ladies. 

他坐在两位年老女士的中间。

the road between here and London 

此地和伦敦之间的公路

I bought a motorcycle to commute between my home and my office. 

我买了一辆摩托车骑着上下班。

We had a four-hour wait in Bangkok in between. 

其间我们还在曼谷等了四个小时。