🧩 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. 皮德纳（马其顿古国城市）
🗣️ 情景例句
Sure, what do you want?
可以啊。什么事
Do I have to go to a hospital?
我应该住院
Though a number of descents have been made, much of it still remains to be explored.
人们多次进入洞内探险，但至今尚有不少东西有待勘探。