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People began to make robots about several hundred years ago.
人们开始约数百年前开始使用机器人。
youdao
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It's acknowledged that several hundred years ago Earth became much warmer.
现已承认地球在几百年前变得更暖。
youdao
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It's acknowledged that several hundred years ago Earth became much warmer.
现已承认地球在几百年前变得更暖。
youdao