短語詞組短語steep down grade 陡下坡steep -grade mine 急傾斜鑛井steep p grade 急傾斜culvert on steep grade 陡坡涵洞steep grade mining 陡幫開採(cǎi)sustained steep grade 持續(xù)陡坡a steep grade 陡坡long steep grade 長(zhǎng)大坡度Hurley Steep Grade T -Shirt 赫利陡坡 返回 steep grade