另外, 还讨论了苯甲醚类 、 二联苯恶二唑类、联苯胺类与 氮杂 类等新型双恶唑啉配体的合成.Besides, the synthesis of diphenyl ether, diphenyl oxadiazole diphenyl amine and aza - bis ( oxazolines ) is also discussed.以3,3′-二氨基联苯胺为显色剂, 研究了分光光度法测定有机物中的微量元素硒.Using 3,3� ...
两方程对应的特征方程是恒等的.The characteristic equations of the two equations are identical.和两个不同的主胁变相对应的主方向是互相正交的.The principal directions corresponding to two distinct principal strains are orthogonal.相对论涉及两个似乎对应的概念.The theory of r...
There's a nasty mark on the tablecloth, and I don't think the usual washing powder will take it out.桌布上有一块污迹, 我想用普通洗衣粉是洗不掉的。If the bailiff thinks that things could turn nasty he will enlist the help of the poli...