| 释义 |
DEFINITIVE EXAMPLES 权威例句〔epicyclic train〕A system of gears in which at least one rotating gear revolves about another.行星齿轮系：一个齿轮系统，其中至少有一个转动的齿轮围绕另一个齿轮转动美国传统〔planet wheel〕One of the small gear wheels in an epicyclic train.行星齿轮：周转轮系中的小齿轮之一美国传统〔planetary〕Being or relating to a gear train consisting of a central gear with an internal ring gear and one or more pinions.行星齿轮的：作为或关于包含一个中心齿轮，一个内环形齿轮和一个或多个小齿轮的齿轮系列的美国传统 |