Cycads removed from their native habitats—and therefore from insects native to those habitats—are usually infertile. 从原生栖息地移走的苏铁,以及从原生栖息地的昆虫身上移走的苏铁,通常是不育的。
The land was barren and infertile. 这片土地荒芜而贫瘠。
Male infertility is becoming commonplace. 男性不育越来越常见。