Using benzene as internal standard, the calibration factors of derivative of aldehydes 2,4 - dinitrophenylhydrazine ( DNPH ) were measured.将醛类物质与2, 4- 二硝基苯肼 ( DNPH ) 的衍生反应液直接进样,以苯为内标物,测定了甲醛 、 乙醛等醛类物质DNPH衍生物的校正因子....
他们费力地挪动到那边躲避。They have dragged themselves thither for shelter.你到那边去找,我到泉水旁边看看.You go over that way and I'll hunt around by the spring.我们到那边去,找个地方坐下来慢慢说.We'll find a place to sit down and have a long talk....
Professor Dale Hess directs Goshen College's Environmental Education Collegiate Program.DaleHess教授指导Goshen学院环境教育学院的项目.Members of the collegiate bench must total an odd number.合议庭的成员人数,必须是单数.The approximately 180 jud...
The only snag is, I can't afford it!惟一的困难是, 我付不起这钱!It is to be expected that an experiment will sometimes run into a snag at first.开始试验时有时不很顺手,也是很自然的.A police clampdown on car thieves hit a snag when villains stole ...
我可能会买一件送给朋友当生日礼物，逗他开心。I might buy one for a friend's birthday as a giggle.她的孩子们的生日聚会在街坊四邻里是最好、最讲究的。Her children had the best, most elaborate birthday parties in the neighborhood.他于1988年6月被封为爵士，是女王生日宴会上的受勋者之一。He was ...