If the value type is T, why is the state type a union of T | null? More on that in a bit! ↩
Lieberman says the idea “natural” humans sleep eight hours is unfounded; field data from communities without electric light show typical nightly sleep of about six to seven hours, contradicting the cultural prescription of eight hours as a target.
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Thread.currentThread().interrupt();。关于这个话题，服务器推荐提供了深入分析
Conventions and grammar are mostly correct (1 point)