His shoes were beginning to show signs of wear.

他那双鞋看样子快穿坏了。

《牛津词典》

By 5-10 years: Teeth show more wear and signs of disease.

5 - 10岁，牙齿磨损程度加重，出现病牙症状。

youdao

But an exceptionally dry surface started to show signs of wear after just a couple of overs, courtesy of Peter Siddle's bustling footmarks, and by lunch repairs usually made much later in a Test match were being carried out by the ground staff.

BBC: England struggle in deciding Test

Have them replaced whenever they appear cracked, brittle, frayed, become loose or show signs of excessive wear.

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