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"So, a single Falcon 9 rocket has about 30kg, so this is quite a lot more," he says.
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贫困是顽疾，“顽”在成因复杂、难以根除、极易反复。
He frames modern eight‑hour dogma as a legacy of the Industrial Revolution rather than a biological necessity, and points to epidemiologic curves where risk bottoms out around seven hours, producing a U‑shape with higher risk from both short and long sleep.