Epicyclic train
行星齿轮系, 周转轮系, 外摆线轮系
🧩 词语组成解析
a. [数]周转圆的,[天] 本轮的
🗣️ 情景例句
She suffered terribly when her son was killed.
儿子被杀，她痛苦至极。
I got home, feeling very tired.
我到家时都累死了[分词作状语]
Still, I'm glad the bell is working again.'
不过，钟又能报时了，我还是很高兴的。”