R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...
The glacier scooped a canyon out of rocks.冰河在礁石中冲出了一条河谷.The upper surface of glacier is riven by crevasses.冰川的上表面已裂成冰隙.the deceptively smooth surface of the glacier看似光滑的冰川表面Warmer conditions can send meltwater to the gla...
She smiled at the incongruity of the question.面对这样突兀的问题，她笑了。The incongruity of the word'spirit " in his mouth struck him so sharply.从他嘴里说出不相称的“血气 ” 这两个字,真是强烈地感动了他....