Израиль нанес удар по Ирану09:28
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(There are other emergencies that could bring us to this point. One is a fire, which could result from machinery shorting. Another is a toxic ammonia leak. But these are even more unlikely.)
（三）多次殴打、伤害他人或者一次殴打、伤害多人的。
// 倒序遍历2*len-1次：模拟数组循环（核心！易错点1）