Hexadecyl octyl dimethyl ammonium bromide and hexadecyl decyl dimethyl ammonitim bromide were synthesized.合成了十六烷基辛基二甲基溴化铵和十六烷基癸基二甲基溴化铵两个新型杀生剂.In this paper the origin and development of octyl and decyl glycerate was intr...
地质学家曾研究过热量如何散出地球。Geologists have studied the way that heat flows from the earth.大多数低脂酸奶每100克约含40卡热量。Most low-fat yogurts are about 40 calories per 100g.快走比慢跑能消耗更多的热量。Brisk walking burns up more calories than slow jogging...