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A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. 一个反素数是任意数字系统中，不仅本身是素数反的也是素数 For example in t 阅读全文
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Suppose a bank has N windows open for service. 一个银行有N个服务的窗口 There is a yellow line in front of the windows which devides the waiting area into two par 阅读全文
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多态存在的三个必要条件： 要有继承，要有方法的重写，父类的引用指向子类的对象。 test1（子类1）{ 子类1.test(); } test2（子类2）{ 子类2.test(); } 这两个方法可以写成一个 test(父类){ 父类.test(); } 调用test方法的时候，这样写 父类 a = 阅读全文
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I didn't relate well to people my age. 我没有向人们叙述清楚我的年龄 Maybe the truth was that I didn't relate well to people, period. 可能事实是我没有让人们了解我的周期 Even my mothe 阅读全文