“封”造句

这封信只不过重复了一下土地法。
The letter merely restated the law of the land.

信封被人动过手脚，然后又用胶带封上了。
The envelope has been tampered with and then taped shut again.

我正在等几封重要的信件，可是一封都没到。
I am expecting several important letters but nothing has arrived.