In prehistoric times a group of about 60 people had many kilometers of empty land to wander and search for food in.

在史前时代，60人左右的群体会有数公里的空间来活动觅食。

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In the evening, the digging for bodies ceases, as does the search for drinking water and food, for news about missing parents and friends.

晚上，挖掘被困人员及尸体的工作停下了，搜寻饮用水、食物、失踪父母及朋友讯息的工作也停下了。

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Think about this: Five birds are resting on the fence and minutes later, three birds decide to fly off to search for food.

请思考这个问题：五只鸟在篱笆上休息，几分种后，三只决定飞走去寻找食物。

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"We're already hearing stories about families living on at most one meal a day, children going into the bush to search for wild food and wild fruit, " Mr Lee told the BBC's Focus on Africa programme.

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