BYOB: complexity without payoff
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。
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Musician Letty Stott plays a replica of a carnyx to Fraser Hunter, presenter Alice Roberts and Gary Trimble during filming for Digging for Britain
2. 不改变已有字段/接口语义
In addition to being cleaner for the environment, he said it could be "cheaper to get rid of that waste through an anaerobic digestion plant" than other methods.