BD: "There are two sides to every coin" and "be careful what you wish for because you just might get it"!
BD：“任何硬币都有两面”以及“小心许愿，因为你可能会如愿！”
However, as the old saying goes, "every coin has two sides", and we see that computers also give rise to a number of problems.
但是，正如俗话说 “每个硬币都有两面” ，计算机也会带来不少问题。
However, as every coin has two sides, electronic books also have some disadvantages. For example, long time of reading e-books does harm to our eyes.
然而，正如每个硬币都有两面，电子书也有不足之处。例如，长时间阅读电子书会伤害我们的眼睛。
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