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孩子们排成两行走，前后各有一位老师。
The children walked in twos with one teacher in front on behind.
youdao
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这两位妇人生孩子前后相隔四个星期。
The two women had their babies about four weeks apart.
youdao
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这两位妇人生孩子前后相隔四个星期。
Our birthdays are only a week apart.
youdao
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这两位妇人生孩子前后相隔四个星期。
Our birthdays are only a week apart.
youdao