物种起源

达尔文在《物种原始论》第一版中说道，在美洲有人观察到黑熊一面在水中游泳，一面张大嘴巴捕捉昆虫，我们可以合理地推测那是鲸豚类的演化起点。

物种起源—物竞天择，1859年出版。

secondary center of origin

origin

oblem of the origin of the protein

page table origin

White-Draining Origin-Boosting Powder

insufficiency of the TRUE origin

origin\HALT \NOUN, original \ADJ

gelling agents or thickening agents with proteins of animal origin