だい🔊读音：だい 🔊（罗马字 dai）释义prt家系名marks wh-question (what, where, who)……呢；……吧is it?; isn't it?prt中文借用strengthens one's judgment or conclusion是……呀be; is例句どこへ行くんだい？🔊你这是要去哪儿呀？それは一体何だい？🔊那到底是什么呀？