以酸性黑油为原料合成咪唑啉.The imidazoline was synthesized from black acid liquid.目的:探索出在咪唑啉酮2号位引入2-巯基苯骈噻唑的适宜反应条件.Objective To optimize the reaction condition of 2 - mercaptobenzothiaozole ramification.以环烷酸、有机胺为原料合成咪唑啉油溶性缓蚀剂.A new ty...
He sagged wearily back in his chair.他疲倦地瘫坐到椅子上。Morrison took the news badly and from then on his spirits noticeably sagged.这消息对莫里森打击很大，从那以后，他明显萎靡不振。His upper lip was flat, but the lower one sagged.他上唇扁平，下唇耷拉。There were p...
His quick recovery is ascribable to his sound constitution.他的迅速康复是由于他的健全的体质.Is his failure ascribable to incompetence or to bad luck?他的失败是因为无能还是因为运气坏?Therefore, any changes in the cell are ascribable to the working elect...
Holidays can be horrendous. All right, I'll rephrase that. The first few days are invariably hell.假期可能会糟糕透顶。好吧，让我换一种说法。最初的几天总是如同炼狱。Let me rephrase what I just said.让我来把我刚才说的话换个方法表达一下.This word cannot express my idea...
The technology of undersea mining was then undeveloped.那时候深海采矿技术还不成熟.Technology is changing all that. It's literally parting the waves for today's undersea explorers.技术正在改变这一切, 它正在劈波斩浪为今日的水下探索者开路.For a similar ...