Plot the gain against a time constant, and the shape of the curve tells you the age of the ceramic. Theoretically.

理论上，根据时间变化绘制出所增重量，所绘曲线的形状就可以表明陶瓷的年龄。

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But focusing on close objects involves contraction of muscles controlling the shape of the eye's lens. And one possibility is that "this constant contraction may stretch the eyeball.

目前没有研究显示为什么大量阅读会导致这一结果，但是由于长时间聚焦近处的物体需要眼部肌肉持续收缩以保证视网膜保持需要的形状，因此这种眼肌的持续收缩状态可能会使眼球受到拉伸，长期如此，其原有形状可能会被永久地改变，从而导致近视产生。

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The focusing muscle (ciliary muscle), which controls the shape of the lens, is thus in a constant state of contraction.

这种控制晶体形状的调焦肌肉(睫状肌)，长期处于收缩状态。

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Paradoxically, when we put in schemes to control our food intake or attempt to change our shape, we can think that we are taking charge and we gain some short-term relief from the constant judgmental noises inside our heads.

BBC: Interactive Essay: Transcript