A hydrocarbon was known to be either an alkene or alkane.某碳氢化合物已知可能是烯烃或是烷烃.The hydrocarbon must be an alkene.这个碳氢化合物必定是烯烃.The betaine will collapse to the alkene only when these two functions are eclipsed.只有当这两个基团移至重迭位置时...
The nucleophiles include alkene, alkyne, alcohol, acid, amine, water, etc.亲核试剂包括烯烃 、 炔烃 、 醇 、 酸 、 胺 、 水等.The hydrocarbon must be an alkene.这个碳氢化合物必定是烯烃.A hydrocarbon was known to be either an alkene or alkane.某碳氢化合物已知可能是...
Anne is a Lancashire lass from Longton, near Preston.安妮是兰开夏郡姑娘，老家在普雷斯顿附近的朗顿。"What is it, lass?" Finlay cried.“怎么回事，小姑娘？”芬利嚷道。He was playing the fool with that lass.他在戏弄那个小姑娘....
水中含量极小的化学成分minute amounts of chemicals in the water这两个词之间在意义上差别是极小的.There is a negligible difference in meaning between these two words.我住在一间极小的茅屋里.I live in a tiny cottage....