The researchers then inquired about both groups' family, medical and dental histories.

研究人员获取了这两组研究对象的家庭，病史和牙科史（数据）。

There will also be a family group of the black rhino and a similar group of the square-lipped or white rhino.

展品还包括黑犀牛的家族标本，以及与它非常相近的白犀牛。

It's a call that's more similar in structure to the ones orcas and pilot whales make to identify a family or social group than to the social whistles of marine dolphins.

这种叫声在结构上更类似于逆戟鲸和领航鲸用来识别家庭或社会群体的叫声，而不是海豚的社交哨声。