Perhaps at one time, the baring of teeth sometimes apparent in yawning could have been an aggressive act.
或许从前，打哈欠有时明显地露出牙齿可能就是一种挑衅行为。
The first time it is always a surprise, an invasion, an aggressive act, but once said, "Ilove you" can only be repeated.
第一次永远是一个惊喜、一次冒犯和一次攻击性行动，而一旦说过“我爱你”这句话，它就只能不断地重复下去。
In a 1988 study, University of Zurich ethnologist Edward Stammbach set up an experiment with long-tailed macaque monkeys to test their ability to rein in aggressive behavior and act cooperatively.
在一项1988年的研究中，苏黎世大学的人种学者爱德华·斯塔姆贝奇对长尾猕猴进行了一次试验，以测试它们控制攻击性的行为和相互合作的能力。
Scott Wiener, a supervisor and an advocate for more aggressive law enforcement, said his constituents were urging him to act.
斯科特·威纳(ScottWiener)是一名监督员，他主张加强执法，称选民们敦促他采取行动。
Scott Wiener, a supervisor and an advocate for more aggressive law enforcement, said his constituents were urging him to act.
斯科特·威纳(ScottWiener)是一名监督员，他主张加强执法，称选民们敦促他采取行动。
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