英语语法分析

We study the soil microflora in the wheatland.

我们进行小麦地土壤微生物区系研究。

Study on the soil microflora in the wheatland.

供试小麦田土壤微生物区系研究。

The course of disease in patients with ASST was longer with large wheatland sunjecto having goitre.

ASST阳性患者较阴性患者病程长，风团数量多、面积大，易出现甲状腺肿大。