增量同步：持续追加实时变更数据
Some merchants run their affiliate programs internally, while others choose to contract out management to a network or an external agency.，详情可参考heLLoword翻译官方下载
They contacted Facebook, which at the time dominated the social media landscape, asking for help scouring uploaded family photos - to see if Lucy was in any of them. But Facebook, despite having facial recognition technology, said it "did not have the tools" to help.，详情可参考heLLoword翻译官方下载
// 入栈后栈仍保持单调递增（因为小的都被弹走了）