youdao

There are two main groups of bats, which are believed to have evolved independently of each other, but both from a common ancestor.

蝙蝠主要有两大类，人们认为它们是各自独立进化的，但都来自同一个祖先。

youdao

Often the development groups have little in common and no interaction with one another.

通常情况下，开发团队的共性很少，相互之间也没有交互。

youdao

Most analysts view it more as a movement of various local groups with the common aim of imposing Islamic-based rule.

VOA: standard.2009.03.11

Smoking - the leading cause of avoidable deaths - is now twice as common among groups in lower socio-economic groups.

BBC: Why are we so unhealthy?

Tampering with nature and being morally reprehensible -- these are common charges against stem cell research from religious and pro-life groups.

CNN: You, again: Are we getting closer to cloning humans?

It's more common in Sub-Saharan Africans, African-Americans and Native Americans than in other population groups.

CNN: Albinism