Eye contact is sometimes the key to communication.

目光接触是交流中的一个重要环节。

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Eye contact is a powerful mode of communication among humans, and repeated or prolonged eye contact usually serves two main purposes: to convey interest or hostility.

眼神交流是人类的一种相当有力的交流方式，而多次、较长时间的眼神交流通常是表达两种目的：有兴趣或有敌意。

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Drivers navigate the snarls without the usual tools of human communication, such as eye contact or conversation.

驾车者在弯道间驾驶车辆，并不用到人类交流的常用工具，譬如眼神交流或者会话。

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When sales-training executive Lisa Contini consulted Decker to improve her communication skills, she found eye contact was a key piece of the puzzle.

WSJ: The Decline of Eye Contact