by return of post

例句：

1. 1. Pleasesend me a letter by return of post.
   请通过回邮方式寄给我一封信。
2. 2. Thepackage arrived by return of post.
   包裹是回邮到达的。
3. 3. I need to know theaddress by return of post.
   我需要知道地址，通过回邮方式。