有些“一日一词”之类的语言学习类应用可能看着挺方便，但实际上呢，他们杂乱无章地把一堆毫无联系的词汇摆到你面前，比如：信封、疲惫、一月、接受、洋葱等等。

Those one-word-a-day language learning apps may feel convenient, but thematically, they're all over the place, delivering a chain of unrelated words: envelope, tired, January, receive, onion.

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