C4
abbr. 补体4（complement 4）
🗣️ 情景例句
I heard the professor of that class is very good.
我听说那个班的教授很好。
When Emily came home at three in the morning, her father hit the ceiling.
哎米莉在凌晨2点钟回家时，她父亲大发雷霆。
I want to pick some bananas, said Kate. I'm hungry!
“我要摘些香蕉，”凯特说，“我饿了！”