我这里有个建议给大家，就是每次飞行前的准备工作，它包括两个方面。

My suggestions for you is the "preparation" before every flight. The "preparation" including two major parts.

youdao

我这里有个建议给大家，就是每次飞行前的准备工作，它包括两个方面。

My suggestions for you is the "preparation" before every flight. The "preparation" including two major parts.

youdao