在前言中阐述了本次课题的研究动机、对象、方法及意义。
In the preface, the author elaborates the motive, object, method and meaning of this work.
阐述了目前微燃烧发动机的研究进展。
The research development of the microcombustion engine is introduced.
文中阐述了该封闭行星传动机构的传动比计算，受力分析和效率计算。
The calculations of transmission ratio. force and transmission efficiency are explained here.
文中阐述了该封闭行星传动机构的传动比计算，受力分析和效率计算。
The calculations of transmission ratio. force and transmission efficiency are explained here.
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