Semiannular
a. 半圆形的
🗣️ 情景例句
Hello, I'm glad to meet you. I've heard so much about you.
你好， 很高兴见到你。 久仰， 久仰。
Who's the second?
下一位是谁？
What happened before printing was invented?
印刷术发明以前是怎么一回事？