Principle of conservation
[经] 稳健原则
🧩 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's the matter?
到底发生了什么事？
It's up in the air.
尚未确定。
I haven't even touched your tooth yet.
我还没有碰到你的牙齿呢。