envelope glissette

例句：

1. 1. She carefully placed the envelope inher bag.
   她小心翼翼地把信封放进她的包里。
2. 2. The envelope was addressed to a distantrelative.
   信封上写着寄给一个远亲。
3. 3.He opened the envelope and read the letterinside.
   他打开信封，读里面的信。