The material is readily prepared by reaction of formaldehyde and hydrazine.这种物质很容易由甲醛和肼反应而得到.Examples of such fuels are monomethyl - hydrazine and diborane.这种燃料的例子是一甲肼和二硼烷.Hydrazine perchlorate and lithium perchlorate fo...
The group had a net profit margin of 30% last year.去年，这个集团的纯利润率为30%。Shares slid 11p to 293p after brokers downgraded their profit estimates.股票经纪人降低了他们的利润预期之后，股价下跌了11便士至293便士。They are set to make a big fat profit.他们下定决心要大...
I call him an antic old man.我称他是个古怪的老头。The clown came on with many antic gestures.小丑上场表演许多滑稽动作.Finish: gold, silver, antic silver, antic bronze, copper.外观电镀: 镀金, 镀银, 镀古银, 镀古青铜, 镀铜等....