Piot
abbr. 物质投入产出表（physical input-output table）
🗣️ 情景例句
When is the wedding?
什么时候举行婚礼呢？
There's no such thing as a free lunch.
天下没有白吃的午餐。
We would've called a taxi if Liz hadn't offered us a ride home.
假如李兹不送我们回家，我们就打的了。