同根派生 single celled相关词英汉例句Ultraviolet radiation may also damage marine life by killing one- celled plants called phytoplankton,which form the base of the ocean's food chain.紫外线辐射还可以通过杀死单细胞的浮游植物来破坏海洋生命，这种浮游植物是构成海洋食物链的基础。single celled更多例句