Ditetrahedron
双四面体
🗣️ 情景例句
Goodbye, it was a pleasure meeting you.
再见， 和你见面很高兴。
Which one is more expensive?
哪一个是比较贵的？
Mr.Sawyer comes home from work.He arrives home late.
索耶先生下班回家。他到家很晚。