It's done this way so that controllers can deal with both busy and slow air traffic periods, Richards said.

Richards说，这么做是为了让控制员既能处理航空的忙季也能处理闲季。

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A good way to ease traffic, both for yourself and other drivers, is to put a large gap in between your car and the one in front of you.

对你和其他司机来说，缓解交通的一种好办法就是在你的车和你前面的车之间保留一个很大的车距。这是驾驶的一个很简单的规则。

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Two-Way trunk is the trunk that can be seized at either end which means a traffic may be originated from both side of the trunk.

双向干线是干线可以在任何一端被抓取的干线，这意味着流量可以是来自干线的任何一端。

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