不幸的是，大量的孩子忙于电视节目和电脑游戏，所以对他们来说，外出运动不太容易。
Unluckily now lots of children are busy with TV programs and computer games, so it's not easy for them to go out.
使业务方法抛出运行时的异常。
当没有匹配的构造函数时，抛出运行时异常。
Throw an exception at run time when there is no matching constructor.
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