He fastened back the shutters.

他把活动护窗拉开系紧。

The knot was fastened in such a way that it was impossible to undo.

那个结系死了，没法解开。

He fastened a torch to every pair of tails.

他在每一对尾巴上系上了一支火把。

Before you set out to have a long walk, your shoelaces should be fastened.

在你出发进行长距离散步之前，你要先系好鞋带。

The boat was not fastened, and the motion which she occasioned, made it drift from the shore.

船并没有系好，她一动就使它漂离了海岸。