求翻译：人生不如意事就如满天繁星，如果一遇到挫折就郁郁寡欢，那这个人也就一生也不会快乐。遇到挫折，我们应该像文中的玛丽那样，微笑面对。例如桌子上只有半杯牛奶了，悲观的人，可能会唉声叹气地说：“太倒霉了，只剩下半杯牛奶了！”乐观的人，则可能微笑着说：“太好了，我还有半杯牛奶呢！”同样的境遇，心态不同，人生的轨道恐怕也会不同。是什么意思？

Unhappy in life just like the stars, a frustration if sad, that this person is also a lifetime will not be happy. Setbacks, we should, as Mary did, smile. For example, only had half a glass of milk on the table, pessimistic person, may moan and groan and say: "too bad, only had half a glass of milk! "Optimistic person, it may be said with a smile:" so nice, I still have half a glass of milk! "The same situation the mood is different, the track I'm afraid of life will be different.