这些牙膏或牙粉含有粗槽的磨牙剂，使用龈线上的牙齿的磨损增加。
Sometimes they contain rough abrasives that cause increased abrasion of the teeth at the gum line.
提高了硬盘磨损，导致了故障率增加。
Increased wear of hard disks, leading to an increased failure rate.
关节炎：额外的体重增加了关节的压力，并且在软骨保护时加剧了磨损。
Osteoarthritis: Excess weight adds pressure to joints and wears away at the cartilage that protects them.
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