700 kilometers
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这些实验表明，（鸟儿）要从多至700公里之遥的地方成功地归巢，嗅觉是必需的。
The experiments have shown that the sense of smell is necessary for successful homing from distances as great as 700 kilometers.
这个14岁的男孩与他的父母在他很小的时候就因为他的父母去距离他们的家乡安徽省700公里的地方去工作而分开了很长的时间。
The 14-year-old boy had been separated from his parents since he was little when they left to work 700 kilometers from his home in Anhui Province.
