基本解释氰基甲酸酯同根派生 英汉例句Analysis of Ethyl Cyanoformate and Ethyl Chloroformate by Gas Chromatography 氰甲酸乙酯和氯甲酸乙酯的气相色谱分析methyl cyanoformate 氰甲酸甲酯ethyl cyanoformate 氰基甲酸乙酯cyanoform 氰仿,三氰基代甲烷