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- The synthesis of 3,6-diguandine-1,2,4,5-tetrazine(BDT) and its salts were described from triaminoguanidine nitrate and 2,4-pentanedione after condensation,oxidation and neutralization. Their structures were confirmed by IR,HMR,DSC. 以三氨基胍硝酸盐、戊二酮为起始原料,经缩合、氧化、取代、盐化等反应合成了3,6-双胍基-1,2,4,5-四嗪(DGTZ)及其高氯酸、硝酸、NTO盐,并采用红外光谱、核磁、DSC等分析手段确定它们的结构;
- She was a bit queer after her husband deserted her. 她遭丈夫遗弃後精神有点失常。
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- The door shut with a bang after the angry man. 那人愤怒地走出屋把门砰地一声关上了。
- He had had a blackout after the accident. 事故发生后，他晕过去一阵子。
- It seems so absurd to bear malice after all that. 经过这一切之后还抱有怨恨情绪是很荒谬的。
- He is out and about now after two weeks in hospital. 在医院住了两个礼拜後，现在他能外出走动了。
- If today is Tuesday, the day after tomorrow will be Thursday. 假如今天是星期二，後天就是星期四。
- After a week's work I like to retreat to the country to relax. 工作一周之後，我喜欢躲到乡下松弛一下。
- The eggs began to decompose after a day in the sun. 鸡蛋在太阳下放了一天后开始变坏。
- He kicked in after a long and painful illness. 经过长期痛苦的疾病之后，他死了。
- After harvest we will have a mass of rice. 秋收后，我们将获得大量稻谷。
- Poor Lionel went to pieces after his wife died. 可怜的莱昂内尔在妻子死后垮了下来。
- After a day at the races I was left stony broke. 一天赛马会下来，我一贫如洗。
- After a long coma the sick man slowly came back. 昏睡了好久以后，那个病人慢慢地恢复了活力。
- Industry is reviving after the recession. 经济衰退后，工业正在复兴。
- Relations were slow to normalize after the war. 战后国际正常关系恢复缓慢。
- After the rain the corn shot up as if by magic. 雨后玉米苗像变魔术一般的长起来了。
- The strait was named after its discoverer. 这个海峡是以它的发现者命名的。
- I find his book begin to pall on me after a while. 我发觉他的书读过一阵子就开始对我失去吸引力。
