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
You forgot to ask me for the change.
你忘了问我要找回零钱。
How old?
多老？
You've done very well and made lots of progress.
你功课学得很好，进步很大。