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
OK. What time is it?
好啊。什么时候？
I appreciate your invitation.
感谢你的邀请。
There were no classes this afternoon. My classmates all went to People's Park.
今天下午没有课。同学们都到人民公园去了。