他们一直与各种族群的成员们和平地生活和工作。
They've been living and working peacefully with members of various ethnic groups.
在顾客走进超市时用动态传感器对顾客计数是一回事，而用视频分析把顾客们分类为社会或民族群体却是另外一回事。
Counting customers with motion sensors as they enter a supermarket is one thing, but sorting them into social or racial groups using video analysis is another.
凯瑟克拉(Kasekela)族群是冈贝黑猩猩研究中研究人员们主要关注的对象，自1974年开始，这个族群就对较小的卡哈玛(Kahama)族群发动了一系列的血腥袭击。
Chimpanzee politics could also be violent. Beginning in 1974, the Kasekela community (the main focus of Gombe research) conducted a series of bloody raids against a smaller subgroup called Kahama.
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