英语语法分析

Methods The cure for 29 patients who were diagnosed Tetramethylene Poisoning was retrospectively analyzed, the suitable project of diagnosis and treatment were studied out.

方法对29例确诊为毒鼠强中毒的病人救治进行回顾性分析，拟定合适的诊治方案。

Three photochromic N, N'-1,4-tetramethylene bisspiropyran and bisspirooxazine compounds were synthesized. They have been identified by IR spectra, 1H -NMR spectra and elemental analysis;

合成三种N，N＇-1，4-亚丁基双螺吡喃和双螺恶嗪光致变色化合物，通过红外光谱、核磁共振氢谱及元素分析确证其结构。