// ⚠️ 易错点1：长度≤1的数组本身有序，返回0而非n
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The Soundcore Work comes with a six free months of a pro membership, which you need to operate the device. After the trial, it's $15.99 a month or $99.99 a year, which gets you 1,200 minutes of transcription every month.
經歷了接近半年時間的監禁，對關恆來說，這也加深了他對自由的感受。關恆說，過去在中國的時候，「我只是覺得被關到監獄、失去去自由其實是一個非常可怕的事情，但是具體有多可怕，我感受不到，我也不能完全想象到。」直到第一次真切地感受到失去人身自由之後，他才更意識到自由的重要性。
Backpressure – the ability for a slow consumer to signal a fast producer to slow down – is a first-class concept in Web streams. In theory. In practice, the model has some serious flaws.