excrement可數(shù)嗎

　　例句：

　　My main role was to analyse human excrement.

　　我的主要任務(wù)是分析人體排泄物。

　　Effects of Adding Chicken Excrement to Feed on Production Performance of Growing Pigs.

　　飼料中添加雞糞對豬育肥效果的影響。

　　The excrement of sea birds; used as fertilizer.

　　用作肥料的海鳥糞便。

　　Study on the Utilization of Maize Straw and Chicken Excrement as Feed.

　　利用玉米秸稈、雞糞資源開發(fā)粗飼料的研究。

　　When necessary, they also take a careful look at the patient's excrement.

　　必要時(shí)，他們還會(huì)查看病人的排泄物。