This article presented two theorems: the theorem of relative instantaneous dwell and the theorem of four centers.

本文建立了两个定理：瞬时停歇定理和四心定理。

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This article presented two theorems: the theorem of relative instantaneous dwell and the theorem of four centers.

本文建立了两个定理：瞬时停歇定理和四心定理。

youdao