refractory metals难熔金属For processing the high tensile metals: carbon stell common alloy stell, hard bronze forgeable castiron. etc.加工高抗张强度的金属: 碳素钢 、 硬青铜和可锻铸铁等.Gold retains its lustre for far longer than other metals...黄金保...
内酯是制备其他有机试剂的重要化学品.Lactones are major chemicals used in the preparation of other organic reagents.大环内酯类抗生素是治疗mp感染的有效抗生素.Macrolides are the effective antibiotics in the treatment of MP infection.结论95%乙醇可作为雷公藤内酯醇的洗脱剂.Conclu...
They insist on tastier chocolate than the anaemic British stuff.他们坚持要比淡而无味的英国货味道更好的巧克力。Our buyers insist on high standards of workmanship and materials.我们的买主对工艺和材料坚持要高标准。If you insist on leaving now , please go ahead.你一定...