The mountain rose up in a steep wall of rock 这座山高而陡，形成一道岩石屏障。
2.
He was deeply impressed to see the workers breaking large bars out of steep walls of rock and filling the valley with thunder . greywacke becoming gravel through massive hammer strokes 当时，工人们震天动地从岩壁上取下巨石以及用锤把硬砂岩敲打成碎石的情景给他留下深刻的印象。
