胺能参加与卤代烷的亲核取代反应.Amines can engage in nucleophile substitution reaction with alky.这个反应称为Hofman消除反应, 它很像卤代烷的脱卤化氢反应.This reaction, called the Hofman elimination, is quite analogous to the dehydrohalogenation of an alkyl hal...
Mercator might be used by a geologist mapping current directions in Palaeozoic sediment.地质学家可用麦卡托投影来绘制古生界沉积中的水流方向.The mercator projection is one of the most used world map projection.麦卡托式是最常用的世界地图投影法.We improved arithmet...
It's not naturaI to taIk into a pIastic gizmo to someone you can't even see!对着个塑料玩意和你看不见的人说话很不自然!That gizmo there is actually the key to move forward.那个小东西实际上是继续前进的钥匙.What is this silly little gizmo on the bott...
参议院亦必须决定对总统的被任命人是否要 “ 提出建议或给予同意. ”The Senate also must decide whether to " advise and consent " to the President's appointees.对行贿或受贿的人罚以重金或给予监禁,能减少他们的收入.Stiff fines or jail terms for persons offering or accepting br...
Voltaire was a famous French satirist.伏尔泰是法国一位著名的讽刺作家.He even enjoyed the sharp criticism he provoked from Voltaire.他甚至欣赏从佛太论那儿招来的尖刻批评.He was a man of much worldly wisdom, and in some ways resembled Voltaire.他精于人情世故, 在某些...
Jack showed off his latest squeeze at the weekend.周末杰克炫耀了一番自己新交的女朋友。'I've got a terrible cold.' — 'Have you? Oh dear. Anyway, so you're not going to go away this weekend?'“我得了重感冒。”——“是吗?哦,天啊...
至于复杂性与表面的不规则性, 表面结构, 毛羽程度和织造加工有关.Complexity is related to surface irregularities, surface texture, fuzziness, and weave.纱线毛羽严重影响无梭织造和高密织物的产质量.Yarn hairiness seriously influences and quality of high - speed weaving and hi...