你必须使自己习惯于早起。开发超音速喷气机是一项了不起的成就。

You must accustom yourself to getting up early. 11. Developing the supersonic jet was quite an accomplishment.

youdao

你必须使自己习惯于早起。开发超音速喷气机是一项了不起的成就。

You must accustom yourself to getting up early. 11. Developing the supersonic jet was quite an accomplishment.

youdao