锑的百分含量由各蓄电池生产厂自己掌握.The percentage of antimony may be left to the battery manufacturer.含锑的铅较化工铅好些,由于它有更好的抗蚀性及强度.Antimonial lead is preferable to chemical lead because of its greater corrosion resistance and strength.一种蓝灰色...
怎样缴付购物款以及如何确保安全缴款, 将成为移动商务服务商面临的一大难题.How goods are paid for, and payment security, will be a challenge for m - commerce providers.kg是一家令客户满意的生产商和服务商,该公司提供新型的 、 门的产品,例如砂石.Bunk GmbH + Co. KG offers you more Offers on Sands...
The technique has been to mutate the genes by irradiation or chemicals.该技术是通过放射线照射或者使用化学方法使基因变异。A newer anti-HIV drug called pyridinone caused HIV to mutate into a form which could not reproduce or infect new cells.一种叫作吡...