Methods: The synthesis uses urea as material process includes condensation, opening loop, chloridization and nitrosation reaction. 方法以尿素为原料,经缩合, 开环, 氯化,亚硝化而得.
For a while Kathryn busied herself in the kitchen.凯瑟琳在厨房忙活了一会儿。She busied herself getting towels ready.她忙着把毛巾准备好。He busied himself with the camera.他忙着摆弄那个相机。...
Darlene: What do you think about internet dating?达琳: 你对网络约会有什么意见?They have been dating for months.他们两个人彼此约会已经有好几个月了。...a collection of treasures dating from the Middle Ages to the Baroque period.从中世纪到巴洛克时期的珍宝藏品The pricip...
Separate designed hopper and granulating chamber can be dismantled easily for cleaning.分离设计,落料斗,粉碎室过滤网,便于拆洗.This apparent contradiction is due to the dominance of some sows in defending the feed hopper.明显的矛盾是由于有些母猪仍霸占着饲料...
She swung the hammer at his head with all her might.她使出全身力气抡起榔头砸向他的脑袋。The workers kneel on the ground and hammer the small stones in.工人们跪在地上，将小石子锤进去。Hammer-throwing for women is not yet a major event.女子链球运动还不是主要的赛事。...
The sand on the floor scrunched under our feet.地板上的沙子在我们脚下嘎吱作响。The sand martin is a brown bird with white underneath.崖沙燕是一种褐羽白腹的鸟。They all walked barefoot across the damp sand to the water's edge.他们全都光着脚走过潮湿的沙地来到水边。...
The company needs boosting up, if it is not to be defeated by its competitors.该公司如要在竞争中不被对手挤垮, 就须加强实力.Football kit relaunches are simply a way of boosting sales.成套足球用品的重新推出仅仅是一种促销的手段。But tourism is double-edged, boosting...