一种把系统的各部分连接在一起的电子或机械装置，以保证系统各部分的相互作用以及能量在系统各部分之间传输。
An electrical or mechanical device that joins parts of systems and can affect the interaction of, or energy transfer between, parts of systems.
机械工程师有数学能力来计算由许多复杂的机构相互作用而形成的机器效益。
The mechanical engineer now has the mathematical ability to calculate the mechanical advantage that results from the complex interaction of many different mechanisms.
这不仅对制定混凝土施工工艺有指导意义，而且对研究混凝土搅拌机械的机构与介质之间的相互作用也有参考价值。
As is not only to have directing sense on the construction technology of concrete, but also to have consulting value on the studying interaction between mixing machine and medium.
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