亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process.阳离子表面活性剂通常为季铵盐类.Cationics are usually quaternary ammomium salts.反 离子通常是钠, 钾和铵.The usual counter - ions are sodium, potassium an...
He answered our questions in English but with a thick accent...他用英语回答了我们的问题，不过口音很重。Some compensate by disguise, affecting the accent , posture , and bonhomie of the well - bred.有些人乔装打扮, 弥补缺陷,故意模仿门第高贵的人的言行举止和温文尔雅.He spoke...
He longed to put a little affection into his epistle.他渴望在信里流露出点爱慕之情.A reference to " natural law " can be found in the Epistle of Paul to the Romans.在圣保罗致罗马人的使徒书信中就已论及了 “ 自然法 ”.The epistle deals therefore with the sovere...
共有包括一位精细胞瘤 、 位绒毛膜癌及两位 卵黄 囊瘤在内的四位恶性生殖芽细胞肿瘤的病人于本院治疗.Four malignant GCTs ( 1 seminoma, 1 choriocarcinoma, and 2 yolk - sac tumors ) have been treated in our hospital.目的:探讨心脏 卵黄 囊瘤临床病理特征.Purpose To study the clinicopathologi...