Organization of petroleum-exporting countries
un. 石油输出国组织
🧩 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];
a. 输出的；出口的
国家（country的复数）
🗣️ 情景例句
And what does your father do?
令尊是做什么的？
To start the city planning
着手都市计划
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。