甲基氰

Vitamin [B.sub.12] exists in two primary forms: methylcobalamin and cyanocobalamin.

维生素 B12有两种存在形式：甲基维生素和氰钴维生素。

Amino-3-cyan-N-(2,6-dichloro-4-trifluoromethylphenyl)pyrazole was the important intermediate which was used to synthesize the efficient insecticide "Regent", which was researched and gone in to operation firstly by French Phone Poulenc company.

中文摘要： 5-氨基-3-氰基-N-(2，6-二氯-4-三氟甲基苯基)吡唑是合成高效杀虫剂&锐劲特&的重要中间体，最先由法国罗纳普朗克公司研发并投产，在国内鲜有相关的合成报道。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。