1.The river takes a headlong plunge into a maelstrom of rocks and boulders.
河水急流而下, 入一个漂涡中。
2.A flowing stream inarms a boulder in its passing.
流水围绕大石流过去。
3.They drilled boulder's for inserting dynamite.
他们在大石头上钻孔以便装炸药。
4.He took my hand to help me over a boulder that blocked the way.
他牵着手带爬过那块挡道卵石。
5.Bombproof -A hold or anchor that is thought to offer the utmost security; for example, a top-rope anchor around a large, stable tree trunk or immovable boulder.