来自weather,天气，风化，经受。

1. The effects of weathering can be simulated in the laboratory.

在实验室里可以模拟各种天气产生的影响.

2. The soil is depleted first by having crops grown in it and second by natural weathering and bacterial action.

土壤首先是被种植其中的作物消耗掉，其次受自然风化和细菌活动的侵蚀。

3. This suggests that the optimum for biological weathering would be in a hot, moist climate.

这表明生物风化最适宜的条件是湿热气候。

4. The movement of water is also an important weathering force.

水的运动也是一种重要的风化作用力.

5. Since the moon lacks an atmosphere, weathering did not occur there.

既然月球没有大气层, 那里就不会发生风化.