All the units employ hollow burned - clay blocks as the basic raw material.所有构件都用空心陶土砖做基本原料.Bark may be used as raw material for paper - making.树皮可以做造纸的原料.Only 55 per cent of the raw material is canned. The rest is throw...

n.原料，原材料，生料...

raw material的音标：raw material的英式发音音标为：[rɔ: mə'tiəriəl]raw material的美式发音音标为：[rɔ mə'tɪriəl]...