* - this.stack：单调递减栈，存储「价格对应的索引」，栈顶→栈底索引对应的价格单调递减
The online world is full of content restrictions and blockades. It might not always seem like that, but look around. More and more restrictions on your movement are coming into force.，这一点在搜狗输入法下载中也有详细论述
# Speaker diarization，推荐阅读服务器推荐获取更多信息
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