wear and tear

Từ điển Oxford Advanced Learner 8th

ˌwear and ˈtear idiom
the damage to objects, furniture, property, etc. that is the result of normal use
•The insurance policy does not cover damage caused by normal wear and tear.
•The living-room carpet has to stand up to the combined wear and tear of two dogs and three children.
Main entry: ↑wear_idiom