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。
Soon after focusing on writing full-time, he realized his fiction suffered because he was out of shape.
在专心全职写作不久，他意识到他小说写不好是因为他身体不健康。
Focusing on the high error and time consuming of the algorithms for shape from shading (SFS), a fast viscosity solution algorithm of perspective SFS (PSFS-FVS) is proposed.
针对传统的从明暗恢复形状(SFS)算法存在误差大、耗时长的问题，提出了一种SFS的快速黏性解算法(PSFS - FVS)。
The focusing properties of a space-charge lens depend on the size, shape and density distribution of its electron cloud.
空间电荷透镜的聚焦特性决定于其电子云的大小、形状和密度分布。
The existing formula is focusing on the calculation in concave roll-shape design, which is very complex.
现有的辊形曲线计算公式以凹辊辊形的设计计算为主，且繁而复杂。
By focusing on this nonvarying piece of anatomy, you'll be less tricked by changes in hair length or color, clothing, and even body shape and height.
只要留意这一不变的特征，你很少会被头发长短与颜色、着装甚至是体型及身高的等的变化而蒙骗。
By focusing on this nonvarying piece of anatomy, you'll be less tricked by changes in hair length or color, clothing, and even body shape and height.
只要留意这一不变的特征，你很少会被头发长短与颜色、着装甚至是体型及身高的等的变化而蒙骗。
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