normal wear

基本解释

If a defect is due to normal wear of working parts of the product.
缺陷是由于产品零件正常磨损造成的。
Lint is a collection of tiny, loose fibers that come off your clothes due to normal wear and tear.
绒线是一些小小的散纤维，他们通常在洗涤过程或者是撕扯中产生。
And if you factor in the probability of normal wear-and-tear over the course of the year, any game could wind up looking very different than it did on paper in August.
如果你把那些不正常磨损的可能性结合起来，那么所有比赛可能都不会像八月份时看起来那么乐观了。
lbjbbs.w201.vpsol.net

they wear, much would, just normal clothes that probably all around the world people wear.
他们一般都是穿的全世界普通大众穿的衣服。
英国皇家赛马会 - SpeakingMax英语口语达人

Could this become a common problem that unfolds over the course of normal wear and tear?
FORBES: Microsoft Responds To Surface RT Touch Cover Tearing Issues
Gale argued that in a typical license arrangement, there is an understanding that the property will be returned to the grantor of the license subject to normal wear and tear.
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