Merchant Ship Search and Rescue Manual;

商船搜寻救助手册；

This merchant ship was convoyed by a destroyer.

这只商船由一艘驱逐舰护航。

This merchant ship was convoyed by a destroyer.

这艘商船由一驱逐舰护航。

This merchant ship was convoyed By a destroyer.

这艘商船由一驱逐舰护航。他的职业是经商。

This merchant ship was convoyed by a destroyer.

这艘商船由一撵走舰护航。