Conservation of electricity
[电] 电量守恒
🧩 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
When do you need the money?
你什么时候需要钱？
She is very fed up about it.
她对此非常不满。
No, thanks. Help yourselves to the cakes.
不必，谢谢。请随便吃些糕点吧。