Ppi
[经] 生产者物价指数
🗣️ 情景例句
Are they always that difficult to make?
领结这样难打吗？
No man is so old, but thinks he may yet live another year.
人越活越想活。
Well, we listened to lectures about pollution, agriculture, nuclear waste, radiation and so on.
噢，我们听取有关污染、农业、核废料、辐射等讲座。