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乐观是天生的吗?著名心理学家马丁·塞里格曼为我们示范了这样一个实验:一批小鼠被分成两组,第一组被放在一个盛满不透明液体的池里,池里有一座小岛,但淹没
Is the optimism natural? The famous psychologist Martin Seligman showed us an experiment in which a group of mice was divided into two groups. The first group was placed in a pool filled with opaque liquid. There is a small island but it is submerged