Specification of problem
[计] 问题说明
🧩 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
That's where our difficulty lies.
那就是困难所在。
Where were you on Tuesday?
星期二你在哪里？
I can't help it.
我情不自禁。