After the islands separated, the isolated lizard populations would have become distinct species while also retaining their ancestors' niche adaptations.
岛屿分离后，孤立的蜥蜴种群将成为独特的物种，同时也保留了它们祖先的生态适应能力。
2
Speakers of these cultures often read oral presentations from carefully retaining manual scripts.
来自这些文化背景的演讲者，在做口头报告时通常在念他们事先精心准备好的手写稿。
3
The conditions for acquiring and retaining a thick nitrogen atmosphere are now readily understood.