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He investigates geometrical properties of cycloids , epicycloids, and hypocycloids.是什么意思？

He investigates geometrical properties of cycloids , epicycloids, and hypocycloids.

他研究了摆线 、 圆外旋轮线和四点圆的旋轮线的几何性质.

相关词汇
he investigates geometrical properties of and

he

pron. 他，它，一个人；n. 雄性动物；

investigates

n. 调查( investigate的名词复数 )，审查，侦查，研究；v. 调查( investigate的第三人称单数 )，审查，侦查，研究；

geometrical

adj. 几何的，几何学的，几何图案的，成几何级数增加的；

properties

n. 房地产(property的名词复数)，财产，所有权，特性；

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

and

conj. 和，与，而且，于是，然后，因此；
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