可能有个别人能在一天之内记忆一千个单词，但是，他们无法一劳永逸地记住这些单词。
Though a few people can remember one thousand new words a day, they can't remember them once for all.
这是回报之时。我已经一劳永逸地证明我能成为冠军。
This was payback time. I've proved once and for all I can become champion.
你是自己快乐的钥匙，因此，往前走，一劳永逸地打开它。
You are the key to your own happiness, so go ahead, unlock it once and for all.
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