Things of the same kind naturally group together, while things of different kinds tend to separate or distinguish themselves.
在学生社团招新时，大家很快就会发现，兴趣相投的人会自然而然地聚在一起，这就是所谓的类聚群分。
During student club recruitment, people with similar interests quickly and naturally gravitate towards each other, demonstrating the principle that like attracts like and different groups form.
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