磨牙和紧要牙齿(应激状态下会加剧)会导致牙齿过度磨损甚至出现裂缝。
Grinding or clenching your teeth (which can intensify if you're stressed) can cause excessive wear and even cracking and chipping.
但是另外四个——家庭、健康、朋友和精神是玻璃球，如果你把其中任何一个丢在地上，他们将不可避免的磨损、打上印痕、甚至支离破碎。
But the other four balls - family, health, friends, and spirit are made of glass. If you drop one of these, they will be irrevocably scuffed, marked, nicked, damaged, or even shattered.
测量系统要求金属配副磨损量应很小，甚至可以忽略，以确保结果的准确性。
In order to assure results correctness the requirement for system is that friction wear of metal pairs must be a little, even omitted.
应用推荐