不过航空运输延迟和低效的主要原因还是过时的空中交通管制——一套依靠地面控制、反应迟缓的雷达站和不断重复的语音通讯建立起来的体系。

But delays and inefficiencies in air travel are due in large part to an outdated traffic-control system that still relies on slow, ground-based radar stations and repetitive voice communication.

youdao

选择可重复利用或者可降解的包装材料，同时在保证设备运输安全的情况下，尽量少用华而不实的包装材料。

Choose reusable biodegradable packaging materials or, at the same time in the guarantee equipment transportation safety, use less as far as possible of slick packaging material.

youdao

这是不可能的运输时间，我回重复在一个地方，在同一时间同一张照片。

It cannot change time for me to come back to one place and take the same photo.

youdao