4周搞定2000+托福核心词
上层土
topsoil
常考释义
n. 表土【农】
A week later, no smell could be detected as the workers tamped down a final layer of topsoil.
一周以后，当工人将最上层的表层土夯实以后，臭味就消失了。
Also, some thought the land couldn't really be damaged, you know, that the soil was so rich and deep that it didn't matter if the topsoil, the soil on the surface, blew away.
此外，有些人认为土地不能真正被损坏，你知道，土壤是如此的肥沃而深厚…如表土即表面上的土壤是否被吹散并不重要。
来源于：听力EXTRA2 L3It can literally take thousands of years to create good topsoil that will grow vegetation, and a very short time to ruin it.
创造可以种植植被的好土壤几乎要花成百上千年，而破坏好的土壤则只需要很短的时间。
来源于：听力EXTRA2 L3vt. 用表土覆盖（田地）
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