boulders

The river takes a headlong plunge into a maelstrom of rocks and boulders.

河水下， 入一个漂砾的漩涡中。

A flowing stream inarms a boulder in its passing.

水围绕大石过去。

They drilled boulder's for inserting dynamite.

他们在大石头上钻孔以便装炸药。

He took my hand to help me over a boulder that blocked the way.

他牵着的手带爬过那块挡道的卵石。

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.

非常可靠的支点或护点，例如，在大树或者巨石上做的护锚点。