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！
