Granite as raw material, PSA is made in a series of aggregate reactions of chemical fusibility.选用花岗闪长岩为原料, 通过一系列的化学熔融聚合反应制成新型絮凝剂———聚硅酸铁铝盐絮凝剂.Its petrology , petrochemistry and geochemistry feature show the intrusive is p...
She spoke in a low voice, always without inflection.她低声说话, 总是声调平平无抑扬变化."Seb?" he said, with a rising inflection.“是塞伯吗？”他扬声问道。The man's voice was devoid of inflection...那人的声音缺少抑扬变化。'Seb?' he said, with a ri...
我是献血者，我不能冒任何接触传染的危险。I'm a blood donor; I can't risk any contagion.营养不良的人更有可能被传染。Infections are more likely in those suffering from malnutrition.那种病毒不会通过接触或握手传染.The virus is not passed on through touching or sha...
Henry VIII decided to dispark the Duchy parks and turn them more profitably into pasture.亨利八世决定开放若干公爵猎园,把它们改作更加有益的牧场.They thought they should occupy their leisure more profitably.他们觉得应当更好地利用空闲时间。The 28 French stores are ...
狄氏剂与艾氏剂有关,对蚯蚓的毒性是相似的.Dieldrin is related to aldrin, and its toxicity to earthworms is similar.艾氏剂和氯丹都是重要的杀虫剂.Both Aldrin and Chlordane are valuable insecticides....