Intrados
n. 拱腹(线), 拱之下面, 内弧面
🗣️ 情景例句
And have a nice afternoon.
祝下午玩得愉快。
There is no medicine against death.
人间哪有不死（回春）药。
What do you do in the theatre?J:
你在剧院做什么工作？