China is planning to install scores of such systems, not just where landings and take-offs are difficult but also at congested airports.

中国正计划不仅在降落起飞困难的机场，而且还在航班繁忙的机场安装几十套这种系统。

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Against a tight timeline, the teams must prepare their vehicles to make vertical take-offs, controlled flights and successful landings-and then hop back home again.

在限定的时间内，参赛队伍必须让他们的飞行器垂直起飞，成功地控制飞行和降落，然后返回。

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Always try to keep the number of landings you make equal the number of take offs you've made.

经常保持降落数目与起飞数目相等。

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