讲解文本：

buckle up 系好安全带，把…扣紧

Hey man! Buckle up. It's safe. It's the law!

哥们，系上安全带!这样才安全啊，而且这是法律规定。

Please buckle up now. We're about to land.

现在请系好安全带，我们要着陆了。

疯狂练习吧!