你对于简单机器抱有这种想法，是很自然的事。
It's easy to see why you might think that sort of thing when you stick to simple machines.
制作一个能工作的简单机器人要花多长时间？
这种机器看上去像是简单机器复杂化的严肃产物。
They seem like terribly serious versions of what has come to be known as Rube Goldberg machines.
所有机器都是由一个以上的简单机械组成；我们认为这是很清楚的。
We think it quite obvious that all machines are made up of one or more simple machines.
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.
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.
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