n.卵石,圆石,巨砾,冰砾,漂砾
A flowing stream inarms a boulder in its passing.
流水围绕大石流过去.
I saw her push the boulder down on you.
我看见她将巨石推下砸向你。
The boulder sheltered them from the chilling wind.
那块大石头替他们挡住了寒风。