英语语法分析

Objective to study the effective duration of niclosamide and influencing factors in water and soil.

目的研究氯硝柳胺在水体及土壤中的持效时间及其影响因素。

Objective To evaluate the snail control effect of 4% powder of niclosamide ethanolamine salt in the field.

目的评价4%氯硝柳胺乙醇胺盐粉剂现场灭螺效果。

After reaction finished, cool the mixture with ice water while agitating so as to get crystallizing niclosamide.

反应结束后将混合溶液用冰水冷却，边冷却边缓慢搅拌结晶。