Such things as facial expressions, body languages and eyecontacts play important parts in giving a speech.
诸如面部表情、肢体语言和眼神交流等在演讲中发挥着重要作用。
2
The lenses, which are no more difficult to see through than normal contacts and can be worn for a month at a time, could also be loaded with drugs for cataracts and other eye conditions.
该种隐形眼镜和普通隐形眼镜一样，一次可以使用一个月时间，同样可以用于治疗白内障及其他眼疾。
3
So because contacts are right on the eye and move with the eye, there's no optical center.