如果你不幸福的原因是来源于一种你无法控制的情形，那你可以寻找其他方法来加以弥补。
If your unhappiness stems from a situation beyond your control then find other ways to compensate.
这种减退可能的原因就是医疗的进步，由于这种原因让老年人的不幸福。
That decline is probably because of much better medical care, which has reduced feelings of hopelessness among the elderly.
这种减退可能的原因就是医疗的进步，由于这种原因让老年人的不幸福。
That decline is probably because of much better medical care, which has reduced feelings of hopelessness among the elderly.
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