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制作一个能工作的简单机器人要花多长时间？
How long does it take to get a simple robot working?
youdao
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现代机器虽复杂，但实质上不过是简单机械的组合。
Complicated as a modern machine is, it is essentially a combination of simple machines.
youdao
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现代机器虽复杂，但实质上不过是简单机械的组合。
Complicated as a modern machine is, it is essentially a combination of simple machines.
youdao