词典释义：
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There's a saying: Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it's called "present".
有句话说的好： "昨日已逝，明日未知，而今日为金"，这就是为什么叫它“今”日。
《Kung Fu Panda》《功夫熊猫》
双语例句
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Yesterday is History. Tomorrow is Mystery.
昨日已成历史，而明日仍是个谜。
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Yesterday is history.
昨天已是历史。
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Yesterday is history.
昨天已成历史。
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Yesterday is history tomorrow is mystery.
昨日已成历史，而明日仍是个谜。
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Yesterday is history. Tomorrow is mystery.
昨天已成为历史。明日却依然是谜。
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