1. Because females do not have this tendency (this brain division is known to be influenced by male sex chemicals), girls who perform well in mathematics are doing so because they are superior in their overall mental development.
    因为女性不具备这种趋势（人脑的这种分工已知是男性激素影响的结果），数学好的女孩是因为她们的整体智力发育很好。

2. Both Plomin's and Benbow's findings would seem to give support to the argument that outstanding mental abilities are largely the result of genetics.
    普罗明和班博的研究结果似乎都支持了出众的智力主要是遗传的结果这一论断。

3. We do addition and subtraction in arithmetic.
    在算术里，我们作加减运算。

4. If there is any effect of noise upon mental health,
    如果噪音对精神健康有影响的话，

5. We have put old women in nursing "homes" with absolutely no intellectual stimulation, isolated from human warmth and contact, and then condemned them for losing their mental abilities.
    我们把老年妇女送进养老之"家"，那儿没有丝毫促进思考动脑的活动，远离人间的温暖和交往，然后指责她们丧失了思维能力。

6. The influence of the factory upon the physiological and mental state of the workers has been completely neglected.
    工厂对工人的生理和心理状态的影响完全被忽视了.

7. The growth of alternative mental interests is a long process.
    精神上多种情趣的培养是一个长期的过程。

8. Lack of physical and mental energy, both of which are essential in turning out and throwing away, and sentiment.
    一是体力，精力均告不佳，这二者是清除无用的东西必不可少的因素；另一原因是感情因素。

9. The illness had not really left her; it had gone into hiding, instead, and the physical and mental after-effects of that historical August 6, 1945, would trouble Kaz all the rest of her life.
    但是她的病没真正除根，只不过是潜伏起来了而已。历史上这个让人难忘的1945年8月6日给和子的肉体和精神上所带来的后遗症将折磨她的余生。

10. He is good at mental arithmetic.
    他擅于心算。