例句：
My main role was to analyse human excrement.
我的主要任务是分析人体排泄物。
Effects of Adding Chicken Excrement to Feed on Production Performance of Growing Pigs.
饲料中添加鸡粪对猪育肥效果的影响。
The excrement of sea birds; used as fertilizer.
用作肥料的海鸟粪便。
Study on the Utilization of Maize Straw and Chicken Excrement as Feed.
利用玉米秸秆、鸡粪资源开发粗饲料的研究。
When necessary, they also take a careful look at the patient's excrement.
必要时，他们还会查看病人的排泄物。