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Just then a security guard standing by a window sees it.
就在这时，站在窗旁的保安见到了。
youdao
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The guard forbade us to look out of the window when the train was moving.
火车开动时，乘警不许我们将头伸出窗外看。
youdao
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The guard forbade us to look out of the window when the train was moving.
火车开动时，乘警不许我们将头伸出窗外看。
youdao