“石的”用英语怎么说？

他是个不惜利用他人成就作踏脚石的人。He was a man who traded on the achievements of others.小溪潺潺流过多石的河床.The brook warbled over its rocky bed.我知道这失明的母亲的眷眷的心,柔石的的拳拳的心.I know the heart of that blind mother and Rou Shi's devotion....