经过加入碳酸钠能被软化的硬水,称为永硬水.Hard water which can be softened by adding sodium carbonate is called permanent hard water.提高水温能增加洗涤中纺织表面膨胀和软化的程度.Increased water temperature can increase swelling and softening of the surfaces of te...
尽管他家境一般，但也并不算贫穷。Though his background was modest, it was in no sense deprived.居民们普遍都很贫穷，受教育程度低，居住条件较差。Residents in general are poor and undereducated, and live in sub-standard housing.邓恩先生贫穷的托词只是部分成立。Mr Dunn's pleas...
去除内应力,如用冲压 、 完全或焊接成型的工件.To remove internal stress as those produced by drawing, bending, or welding.摘要单向拉伸试验中,在比例极限内, 应力应变关系服从胡克定律.In simple tension experiment, the stress - strain relationship submits Hook's law wi...