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
as well as the younger people of Riverdale.
和年轻人服务。
The doctor is busy examining a patient.
医生为给病人做身体检查而忙碌着。
OK. I'll get the waiter.
好的，我去叫侍应生来。