Because of long mileage, every tire wears away and the tread pattern depth becomes very shallow.

因为跑了很长的里程数，每个轮胎都磨损了而且胎纹深度都变的很浅了。

youdao

Tread lightly, or you could inadvertently scare others away.

放轻脚步，要不你可能无意中把别人吓走。

youdao

Slader has chosen to veer away from the traditional non-profit course education start-ups tread.

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