Retrolaunching
逆飛行方向發射
??? 情景例句
Paper or plastic?
現金還是信用卡？
OK. We have a nonstop flight leaving Kennedy at 9:25.
好的。9點25分有一趟直達班機，從肯尼迪國際機場起飛。
The question was, which one?
問題是，哪一種氣體導致火災呢？