每年冬天工廠的天然氣供應會被切斷數日甚至數週；天氣較熱時則面臨停電。大城市的居民也經常得忍受住宅停電或飲用水遭到中斷。
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The same issues exist on the WritableStream side. A WritableStream has a highWaterMark and desiredSize. There is a writer.ready promise that producers of data are supposed to pay attention but often don't.