英语语法分析

Inadequate disposal of human excreta is a major health risk in emergency situations.

在紧急情况下，人类排泄物的不适当处置是一个主要的健康危害。

The excreta of humans and land animals contain soluble refractory organic matter.

人和陆生动物排泄物含有可溶的难处理有机物质。

Humans usually become infected with Lassa virus from exposure to excreta of infected Mastomys.

人类通常通过暴露于受感染的Mastomys鼠的排泄物感染拉沙病毒。