Category of machine
[计] 机器范畴
🧩 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];
🗣️ 情景例句
What are you working on?
你在干什么？
From which station does the train leave?
这列火车从哪个站开出呢？
What's up? What's up? someone called.
“什么事？什么事？”有人叫着。