Never show the bottom of your purse or your mind.钱包不露底,思想需保留。They collected a purse to help the flood victims.他们收集了一笔钱以帮助洪灾难民。His purse, which was very dry at that moment , did not permit him any other equipage.当时他正囊空如洗,...
Silver - coated carbonyl iron powder was prepared by using electroless plating method.用化学镀法,甲醛为还原剂,制备镀银羰基铁粉.The p - chlorophenyl isocyanate is synthesised by carbonyl chloride and p - chloroaniline . The yield is 90 %.采用...