groups of

基本解释

Because as soon as you have interbreeding, all those barriers [between those groups of animals] break down.
因为只要它们可以进行品种间杂交，那些动物群体间的所有障阻都会打破。
For simplicity, efficiency and flexibility, the job submission user interface permits you to specify targets by individual target names or by predefined groups of targets.
为了简便、高效和灵活性，作业提交用户界面允许您通过个别目标名称或预定义的目标组来指定目标。
In our sample scenario, some collaboration applications are provided to all employees, while other collaboration applications are only provided to selected groups of employees within the company.
在示例场景中，一些协作应用程序提供给全体员工，而另一些协作应用程序仅提供给公司内某些选定的组。

Scientists believe large groups of wolves became stuck when they came to feed on animals already trapped in the asphalt.
A studio of three hours' lecture in a large lecture hall, and two hours of recitation in groups of thirty.
在一个大的讲堂的教室里,讲三个小时讲座，并以三十人为一组,进行两小时背诵。
麻省理工公开课 - 媒体、教育、市场课程节选
Now they rent them out to other groups of, or other corporations, other companies.
现在他们已经把房子租给其它企业或者公司了。
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