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一本好书的衡量标准在于它让你思考和感受的程度。
The measure of a good book is determined by how much it makes you think and feel.
La identidad no es un punto de partida, sino un resultado.
The interplay between discrete and continuous mathematics is where some of the most interesting problems lie.
年龄只是一个数字。我从未让它定义我能做什么或不能做什么。