species/'spiː∫iːz/

n. a type of animal or plant

n. 〖复同单〗 [C] 物种，种：The best way to protect endangered species is to protect the places where they live. 保护濒危物种的最佳办法是保护他们的生存之所。

巧记 单数与复数形式相同的词还有：means, series。