... 六、生物因子(biological factors) 第一节 种群的基本概念(basic concept of population) 一、种群的定义(definition of population) ...
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But for some 5 to 7 percent of the population even basic math—like the concept of the numbers 5 and 7—causes anxiety.
但是对于那5%-7%的人来说，甚至连诸如数字5和7的概念这么简单的数学都会引起焦虑。
The quadratic equation may have instilled horror in many of us. But for some 5 to 7 percent of the population even basic math—like the concept of the numbers 5 and 7—causes anxiety.
恐怕有很多人都对二次方程望而生畏吧…可是你知道么，世界上有5%-7%的人面对最基本的算术也会紧张焦虑。
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