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The new study is both history lesson and warning, the researchers added.
研究人员补充道，新的研究既是历史的教训，又是对未来的警示。
youdao
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Great, we'll study a new dialogue in the next lesson!
好，下面我们来学习几段对话！
youdao
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Great, we'll study a new dialogue in the next lesson!
好，下面我们来学习几段对话！
youdao