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.
我抱着她吻了她一下。I put my arms around her and gave her a kiss.我对如何抱婴儿、如何给婴儿喂食一无所知。I knew absolutely nothing about handling or feeding a baby.她抱着两个用带有冬青枝叶图案的纸包装的盒子走了出来。She came out with two packages wrapped in holly-sprigged pap...
她有些不好接近，但我确信她想表现得友好一些。She was somewhat unapproachable but I'm sure she wanted to be friendly.“我确信我不知道。”库克一甩头说。"I'm sure I don't know." Cook tossed her head.他确信医生和牙医最清楚该怎么做。He was convinced that doctors and...
It is a part of Britain as yet largely unaccustomed to tourists.英国的这一块地方还很不为游客所熟悉。Nothing is known as yet about what transpired at the meeting.会上到底发生了什么现在还没人知道。Dorset is as yet unspoilt by coachloads of tourists.多塞特还未遭到大...