excrement可数吗

　　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。