烧橡胶的刺鼻气味the pungent smell of burning rubber橡胶是稀少而宝贵的, 可是俄国对橡胶的需要量是非常大的.Rubber was scarce and precious, and the Russian demand for it was on the large scale.该光谱表明,聚乙稀类物已经迁移到人造橡胶的表面.The spectrum indicates that a polyethyle...
取120个值计算平均数。Take a hundred and twenty values and calculate the mean.就像歌里唱的那样，两者密不可分，不能只取其一。You can't have one without the other, as the song says.她可以打电话点餐，叫人来取要洗的衣服以及叫其他各种服务。She could ring for food and drink, laundr...