Intrados
n. 拱腹(线), 拱之下面, 内弧面
🗣️ 情景例句
Too easy?
太简单？
I must be off soon.
我很快就得走了。
Oh, we have beautiful sunshine everyday! It's very warm. Sometimes it's too hot.
噢，每天阳光明媚！很暖和。有时太热。