It features a stepped tread pattern that includes a large rectangular lug as the base with smaller square pins mounted on top.

它具有一个加强胎面花纹，其中包括一个大型长方形耳为基础的小广场上安装针顶端。

youdao

I tread the stone steps and enter a huge space by another gate in the top of well.

我踏上石阶，不一会儿便由顶端的另一道门，进入一个巨大的空间。

youdao

The contrast between the fun-loving Brazilian way of life and the discipline needed to stay at the top looks to have become too difficult a line to tread.

BBC: What has happened to Ronaldinho?

In mid-February a top Slovenian manager urged the government to "synchronise its activities with business interests", and to tread very carefully in deciding when to recognise Kosovo's independence.

ECONOMIST: Paying a price for recognising Kosovo's independence