尽管需要很少的空运时间，但是它们能在美国安全起飞之前必须进行全面的检查。

Despite their low flying time, they need complete overhauls before they can safely take wing in the US.

youdao

尽管需要很少的空运时间，但是它们能在美国安全起飞之前必须进行全面的检查。

Despite their low flying time, they need complete overhauls before they can safely take wing in the US.

youdao