They tore minerals from the rocks, 河流冲刷岩石中带走矿物质
Do not step on those weird, pointy rocks! 别去踩那些奇怪的尖石头
They rub particular rocks with their cheeks 像这样用脸颊摩擦特定的岩石
burrowing up to a metre beneath the rocks. 蛋藏在岩石下的深达1米的缝隙里
Now lumps of heavily eroded rocks have been marooned in a sea of sand. 现在 这些严重侵蚀的石块 已被放逐在沙海之中
Few rocks can resist the continuous blast of the sand carrying wind. 岩石很难抵挡风沙持续不断的摧残