// 易错点2：漏写stack.length判断 → 栈空时访问stack[-1]会报错
Цены на нефть взлетели до максимума за полгода17:55
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Медведев вышел в финал турнира в Дубае17:59
They currently make 240 food boxes each week, double the amount produced three years ago, handing them out as they make their way through the city's streets.