4周搞定2000+托福核心词
巨砾
boulder
常考释义
We realize now that the ring particles, which range in size from microscopic dust to boulders, bigger than large houses, well, a lot of these particles are eventually lost.
我们发现这些环中许多的颗粒，从微尘那么小到比房子还大的巨石那么大，最终都没有了。
来源于：听力OFFICIAL53 L4n. 卵石，圆石
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