Laura flits about New York hailing taxis at every opportunity.劳拉穿梭于纽约各处，一有机会就打车。She flits from one dance partner to another.她不断地换舞伴。That child flits about like a wraith.那个孩子像幽灵一样飞快地跑来跑去。...
甘油是所有脂肪和磷脂的组成部分.Glycerol is a constituent of all fats and phospholipids.有人建议在硝化之前,把甘油聚合.Some people proposed polymerizing the glycerine prior to nitration.有人研究过甘油一硝酸脂的性质.The properties of mononitroglycerine were investig...