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
It's a big one!
真大哟！
I think it's going to be too humid.
我认为天气将会太湿。
Look at those people in the boats.
瞧船里的那些人！