* - 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
Stream implementations can and do ignore backpressure; and some spec-defined features explicitly break backpressure. tee(), for instance, creates two branches from a single stream. If one branch reads faster than the other, data accumulates in an internal buffer with no limit. A fast consumer can cause unbounded memory growth while the slow consumer catches up — and there's no way to configure this or opt out beyond canceling the slower branch.
，这一点在Safew下载中也有详细论述
雖然專業的科學與工程職位是核心，但約70%的工作是維持研究站運作所需的營運角色。，推荐阅读safew官方下载获取更多信息
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