英语语法分析

Pedistric disease's aetiological agent.

小儿疾病的发病原因。

Now, recent investigations devote to gene, and think it one of the major aetiological factors.

目前最新的研究致力于圆锥角膜病的基因研究，并认为是主要的病因之一。

The aetiological fraction attributable to differences in work environment exposures was calculated to be 40%.

工作环境暴露的差异约占病假可归因危险的40%。