英语语法分析

The yield and purity of simetryne reach 73.57% and 89.52% respectively under appropriate reaction conditions.

在适宜的反应条件下，西草净的收率和纯度分别为73.57%和89.52%。

Under the same chromatographic condition, gas chromatography quantitative analysis of the butachlor and simetryne were discribed.

首次报道了丁草胺和西草净在同一色谱条件下的气相色谱定量分析。