Turns out parents get a bulk discount: people with only one child spend 25% more per child than families with two, and by the time you have three or more, you are spending 22% less on each one.
而且原来作父母还有“批发价”：只有一个孩子的家庭比有两个孩子的平均多花25%，到你有三个或更多的时候，你每个少花22%。
It's much less of an impact and much more appreciated if you find a serious bug three months before, rather than one day before, a product's scheduled release.
您在三个月前发现一个严重的bug，比在产品发布前一天发现这个bug，产生的影响要小得多而且价值大得多。
When three chess in a line, you can eat one chess of the other's. If one have no chess to move or have chess less than 3, he/she lose the game.
规则是3子连成一线即可吃掉对方一颗子，但被吃子不能在成3的3颗中，当一方无棋可走或者棋子数少于3时，游戏结束。
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