In the wild, they are a co-operative, group-living species.
在野外，它们是合作的群居物种。
Operative control group (group B);
手术对照组（B组） ；
The operative time was shorter and post treatment pain seldom occurred in the experimental group.
试验组操作时间短，术后疼痛发生少。
The operative time was shorter and post treatment pain seldom occurred in the experimental group.
试验组操作时间短，术后疼痛发生少。
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