1. What the eye sees as racial differences — between Europeans and Africans, for example — are mainly a way to adapt to climate as humans move from one continent to another.
    我们眼中看到的人种差异，例如欧洲人与非洲人的差异，主要是人类从一个大陆向另一个大陆迁移时为适应气候所产生的。

2. No one really knows how she/he will adapt to such new customs.
    没有人真正知道自己该如何去适应这新的环境。

3. Do you adapt yourself to new circumstances easily?
    你能很快适应一个新环境吗?