有关硫醇酯类的数据非常有限.Only a very limited amount of data is available on thiol esters.这个合成硫醇的方法,就显得更加重要.This approach to mercaptans takes on added importance.目的讨论合成盐酸吡硫醇的关键反应.Objective To discuss the key synthesis reaction of Py...
A Delta II rocket was launched from Cape Canaveral early this morning.今天一早，一枚“德尔塔”Ⅱ型火箭在卡纳维拉尔角发射升空。Soldiers using a multiple rocket launcher scored a direct hit on the steeple of a church.士兵们使用多管火箭筒直接击中一所教堂的尖塔。A rocket is...
How did you expect us to proceed on such a perilous expedition, through unknown terrain.你怎么能指望我们如此冒险地穿越未知的地域，继续这一探险？As the storm was approaching, the fisher - men were threatened by dangers of the most perilous nature.风暴...
把籽和果核弄掉，将果肉切成小方块。Remove the seeds and stones and cube the flesh.把橄榄的果肉切下来，然后去除果核。Cut the flesh from the olives and discard the stones.将菠萝对半切开，挖出里面的果肉。Halve the pineapple and scoop out the inside....
平型刷头完美塑造婴儿般绒羽美睫.Flat side to build up baby lashes.常见的过敏原包括花粉, 动物皮屑, 绒羽, 螨类, 化学品, 以及各种食品.Common allergens include pollen, animal dander, down feathers, mites, chemicals, and a variety of foods....