I heard his heavy tread on the stairs.

我听到他在楼梯上的沉重脚步声。

Notice how the tread on this tyre has worn down.

注意这个轮胎的花纹磨损的程度。

Don't tread on the crops.

不要踩庄稼。

Don't tread on crops.

不要踩踏庄稼。

Sorry, did I tread on your toe?

对不起，我踩著你的脚了吧？