communication 
英 [kəˌmju:ni'keiʃən]  美 [kəˌmjuːnɪˈkeɪʃn] 
n. 传播；通讯；消息；交通工具；传染

pl. [communications 传播技术；通信系统；【军】（基地与前线间的）交通系统

例句：
Insects such as ants have a highly effective system of communication. 

蚂蚁等昆虫都有高效的交流系统。

We were in communication with each other. 

我们彼此保持着联络。

There was a tremendous lack of communication between us. 

我们之间太缺乏沟通了。

Good communication with people around you could prove difficult. 

同身边人保持良好的沟通可能会很难。