这里惟一的难题是，到达浏览器的东西实质上是一个二进制大文本。
The only difficulty here is that what arrives in the browser is essentially one big blob of text.
直到现在，极力解开“锂之难题”的尝试牵涉到了元素量的二次变异。
Until now, attempts to explain away the lithium problem have involved secondary modifications of the amount around.
第二，对正在受教育的青年和需要照顾的老人的难题会有不良反应，这最终会导致工作的人群和老年人都感到不幸福。
Second, there will be a suboptimal response to the challenge of educating the young and caring for the elderly, so that both the working population and the elderly are unhappy.
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