Dollar earnings of opec countries
[经] 石油输出国的美元收入
🧩 词语组成解析
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
I'm afraid the crash was because of your fault.
抱歉,我怕这次坠毁是你弄砸的缘故。
I was very glad when the boys won the relay race.
我非常高兴,男同学在接力赛中获胜。
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