英德
有道
百度
谷歌
图片
维基
百科
生态龛
niche
- 他们发现，一种名为卵囊干细胞的卵巢干细胞当它们携带突变体粘合素时，即可从它们的生态龛位上漂移出来。
They found that follicle stem cells (FSC) - one type of ovary stem cel - drifted away from their niche when they carried mutant integrins. - 一个可能的原因是所有恐龙除进化为鸟的一支外都死掉了，胎盘类哺乳动物才在被空闲出来的生态龛中得以进化。
A plausible reason is that all the dinosaurs had been killed off, except the line that evolved into birds, and the placental mammals speciated into the ecological niches that had been left vacant.
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