可耐磨损、碰撞，耐海水和脂肪烃类物质。
Resistant to wear, impact, salt water and aliphatic hydrocarbons.
由于风将砂粒刮起来，碰撞大岩石，久而久之，较松软的岩石层就被慢慢地磨损。(只能译成“较”，不能译为“更”)。
When winds blow sand particles against a large rock for a long time, the softer layer of the rock are slowly worn away.
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.
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