The latex concentration is raised by evaporation or centrifugation.通过挥发或离心作用提高胶乳的浓度.The results of the tests indicated that latex and polyurethane foam mattresses burned fastest.试验结果表明,天然乳胶和聚氨基甲酸乙酯泡沫床垫燃烧得最快.Leather and l...
她一副遭人遗弃和背叛的样子。She had the look of someone deserted and betrayed.她又高又瘦，一副精明过人的模样。She was thin and spare, with a sharply intelligent face.她想象着他噔噔噔地走向车子，一副自以为是的模样。She visualized him stomping to his car, the picture of self-...