speciation

Polyploidy is a mechanism often attributed to causing some speciation events in sympatry.

多倍性常被当作引起地区并存物生物形成事件机制。

First, there is speciation (species-splitting or cladogenesis), caused by geographical isolation or some other mechanism.

首先，因地理隔离或其它些机制导致物形成（物分裂或系枝进化）。

This conclusion agress with the viewpoint that this species is on the speciation stage of migration towards north.

这结论支持该目前正处于向北迁移分化阶段观点。

Jolley(1993)is a study of dissolved phosphorus speciation in the lower molongolo sewage treatment plant(Canberra, Australia)detected no triphosphate in raw sewage entering the plant.

Jolley(1993)进行得项研究中溶解磷形态下molongolo污水处理厂（堪培拉，澳大利亚）未现任何未经处理得污水中有三磷酸盐进入工厂。