输送通道的英文

输送通道的英文：
transfer passage

The maritime passage was a good augury for the aerial passage.
顺利的航海仿佛也是航空的好预兆。

Excision of an obnoxious passage was required.
有一段引起反感的文字必须删掉。

The meaning of the passage is obscure.
这段文字意义晦涩。

Free the passage of refuse and debris
把通道上的垃圾和瓦砾清除掉。

How do you take this passage?
这段话你怎么理解？