属一群拥有共同祖先和明显特征的有机体，尤指属于同一物种的一群，通过人工选择来发展，通过有控制的繁殖来维持 A group of organisms having common ancestors and certain distinguishable characteristics, especially a group within a species developed by artificial selection and maintained by controlled propagation.
先驱生物能在不毛之地生存的某种动物或植物种类 An animal or plant species that establishes itself in a previously barren environment.
污染对这一物种的继续生存造成了威胁。 Pollution poses a threat to the continued existence of this species.