excreta

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。

If the quality of food eaten is good, then the excreta is comparitively easier to tolerate.

如果吃的是优质食物，那么排泄物就相对容易忍受。

Nitrogen turnover from grazing livestock excreta is the key process in the nitrogen cycle of pasture ecosystems.

放牧家畜排泄物氮转化是草原生态系统氮循环的关键。