英语语法分析

Most of the examined Ascaris eggs were at the infective stage.

检出的虫卵绝大部分是感染性虫卵。

Objective To understand the inactivation effect on Ascaris suum eggs in urine directing toilet.

目的了解新型厕所—粪尿分集式厕所对猪蛔虫卵的灭活效果。

It involved 300 villagers in an area of Madagascar where both Ascaris and Plasmodium are prevalent.

这项研究使用了300名马达加斯加的村民。蛔虫和恶性疟原虫都在这一地区流行。