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无论在什么地方,人们都接触过各种各样的机械。简单的机械,有杠杆、轮轴、斜面……等。复杂的机械,有抽水机、拖拉机、起重机……等。很难说出,到底从什么年代起人类开始利用机械。但是,有一点我们都非常清楚:人类自从懂得使用并制造工具以后,才和猿猴分了家。这里,并不打算用史学家的眼光来追述这段机械的发展史,也不打算介绍各种各样的机械,只想通过对一些简单事例的分析来了解一下,机械具有那些共同的性质,和弄清楚它们所遵循的基本规律。不管近代的机器是怎样地复杂,种类是怎样地繁多,
No matter where, people have contacted various kinds of machinery. Simple machines with levers, axles, bevels...etc. Complex machinery, including pumps, tractors, cranes...etc. It’s hard to tell, from what time humans began to use machinery. However, one thing we all know very well is that humans have been separated from colobus monkeys since they knew how to use and make tools. Here, it is not intended to trace the development history of this machine with the eyes of historians, nor is it intended to introduce various machines. I only want to understand through analysis of some simple examples that machines have those common properties. And find out the basic rules they follow. No matter how complicated modern machines are, how diverse the species are,