你会提醒同伴在课间活动时注意安全吗？
如果用户15秒内没有按下按钮，指定的“同伴”就会收到提醒。
If they don't press the button within 15 seconds, the companion is sent an alert.
研究人员还发现，当有同伴温柔地提醒自己在场，而非举止粗鲁或强迫它们挑选双份奖励时，黑猩猩多数时候举止慷慨。
The researchers also found that chimps most often acted generously when the waiting partner reminded the chooser gently of her presence but did not act up or bully her into picking a treat for two.
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