为了提高SproutCore的性能以及完善它的API，.Mac团队为在原有基础上又添加了大量的功能。
The team at .Mac added a large amount of functionality to SproutCore in terms of performance and polish to the API.
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。
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.
蛋白质对于修补和复原有决定性的作用，你在马拉松训练中需要补充大量的蛋白质。
Protein is crucial for recovery and repair, which you'll be needing a lot more of during marathon training.
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