Train of wheels
[机] 齿轮系
🧩 词语组成解析
of
[əv]
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];
n. 旋转；车轮（wheel的复数）
🗣️ 情景例句
You tried, Mom.
尽力了， 妈妈。
Don't believe him.
不要相信他。
It was the last day of the year and a large crowd of people had gathered under the Town Hall clock.
那是一年的最后一天，一大群人聚集在市政厅的大钟下面。