我面前的一个牌子上写着：扣好安全带。这是法律规定。

A sign just ahead of me said, Buckle Up. It's the Law.

youdao

我面前的一个牌子上写着：扣好安全带。这是法律规定。

A sign just ahead of me said, Buckle Up. It's the Law.

youdao