由于风把砂粒刮起来， 碰撞大岩石，久而久之，较松软的岩石层就被慢慢地磨损。（译成汉语复句的表原因的偏句）
When winds blow particles against a large rock for a long time, the softer layers of the rock are slowly worn away.
如果你的接头要求比表1建议的值更大的力，检查接头，看密封表面是否有损伤、肮脏或磨损，或螺纹是否磨损或损伤。
If your connection requires more force than the values suggested in Table 1, inspect the connection for marred, dirty, or worn sealing surfaces or worn or damaged threads.
当表镜出现轻微的划痕及磨损时，可在表镜上滴上几滴清水，涂抹少许牙膏，用棉布来回擦拭即可。
When the table mirror appear minor scratches and wear, can be in the table on drop a few drops of water on the mirror, daub a few toothpaste, use cotton cloth to wipe back and forth.
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