by air freight

• 通过空运

by air freight的用法和样例：

例句

1. The article will be sent to you by air.
   该货将通过空运寄给您。
2. You send a letter by air so that your friends may receive it sooner.
   你通过空运的方式寄信，那你的朋友就可以早一点儿收到。