Composition of petroleum
[建] 石油的成份
🧩 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
Where's Robbie? Robbie
在哪儿？
Yes,I had breakfast two hours ago.
是,我2小时以前吃了早餐。
I'm watching the league match, of course!
当然我要看联赛。