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用户不是上帝,用户是朋友。
心理学必须是纯粹实验性和分析性的。
Childhood is fleeting, but the right book can make it last a little longer.
解释:大旱之年收购船只,大水之年抛售船只并收购车辆,待到大旱之年再抛售车辆。
In art, as in life, the simplest solutions are often the most profound.