🧩 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. [天]近拱点
🗣️ 情景例句
I'm very tired.
我很累了。
I meet the boy whose aunt is a librarist.
我遇到那个男孩的姑妈是图书管理员。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。