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Translate the following sentences into English and write the translation on your Answer Sheet.但是十几亿年以来，人们一直都是根据味道来进食的。
【正确答案】：

BUT PEOPLE HAVE BEEN EATING ACCORDING TO FLAVOR FOR UPWARDS OF A BILLION YEARS.

【题目解析】：汉语句子的主干：人们吃饭，people eat。然后把修饰成分加上，由于主句中有“一直”，说明动作持续了很久，而且是不间断的，所以可以断定句子的时态为现在完成进行时态：have been doing。重点词汇和词组：十几亿年以来：for upwards of a billion years。