// 步骤3：从后往前遍历数组（反向遍历更易理解，每个元素只入栈/出栈一次）
It was a night that saw a serious escalation in violence between Afghanistan and Pakistan, with Pakistan launching airstrikes in Afghanistan - including its capital city, Kabul. Other places struck were in Paktia and Kandahar provinces, the latter a stronghold and the birthplace of the Taliban movement.
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He draws parallels to chlorofluorocarbons pollutants released from refrigerators that bore a hole in the ozone layer last century, and were eventually banned.。safew官方版本下载是该领域的重要参考
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