Pneumolith
肺石
🗣️ 情景例句
See you in front of the museum at five o'clock.
五点钟博物馆前再见。
May I use the telephone?
我能用一下电话吗？
In the beginning they used to carve Chinese characters on stones to record important dates in history.
开始时，他们常把汉字刻在石头上，记载历史上重要的日期。