Concentration of production
[经] 生产集中
🧩 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
Am I glad to see you!
我看到你， 真的很高兴！
The statesman retired as the mayor of New York.
那位政治家退休时是纽约市市长。
They all went up some narrow steps into a large room.
他们全都登上这些狭窄的台阶，接着进入一个大房间。