stack.pop(); // 弹出无效元素
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中國在2022北京冬奧愛上了這位「冰雪公主」——作為冬奧形象代言人，她完美兌現了承諾。，详情可参考服务器推荐
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Donald Trump says he has not made a final decision on whether to launch strikes on Iran but is “not happy” with the situation and military force – including regime change – remains an option.