Fix rat traps on the gangplank.

在跳板上安鼠夹。

The surface of the gangplank was bossed to prevent slipping.

跳板的表面被装上凸出物以防止滑动.

I saw her back figure moving on the gangplank with difficulty. My eyes burst into tears.

我看着她的背影艰难地跨过了跳板，我的眼泪夺眶而出。