有一个可信任的人，是非常好的。
当周围有不可信任的人时，它就会发出像口哨一样的声音。
Sneakoscope - A device which looks something like a gyroscope and which gives off a whistling sound when someone untrustworthy is around.
在物种层面上，只要值得信任的人多于不可信任的人就没关系。
At a species level, that doesn't matter so long as more people are trustworthy than not.
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