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
that you care about us.
关心我们大家。
Don't forget to take care of him.
不要忘记照顾他。
The same old favorites recur year in year out with monotonous regularity.
相同的决心以单调的规律年复一年地出现。