They say that vehicles that are capable of sensing their surrounding environment, and their proximity to other cars could maintain safe distances while helping to keep traffic moving.
他们提出，能够探测周围驾驶环境的车辆，在接近其他车辆的时候能够自动保持安全距离，以帮助保持交通畅通。
A fun way to keep kids excited to keep running is to have them track their distances and add them up.
有个好玩的办法可以保持孩子对跑步的热情，就是记下他们跑过的距离并算出总数。
In the wild, elephants often need to communicate over long distances, using low frequency calls to keep tabs on other members of their group.
在野生环境中，大象经常要在距离很远的时候，彼此进行沟通和交流，这时它们会使用低频叫声和同一象群中的其它成员保持联系。
People tend to carry many electrical gadgets to keep the fellow passengers entertained while traveling over long distances.
人们往往会携带很多电器小工具，保持距离，而同车的乘客受理周游长。
Personally I respect the referees and I think the referees have to keep their distances from the managers and the players.
从个人角度我尊重裁判，我认为裁判应该与教练和球员保持距离。
Personally I respect the referees and I think the referees have to keep their distances from the managers and the players.
从个人角度我尊重裁判，我认为裁判应该与教练和球员保持距离。
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