Odu
[医][=optical density unit]光密度单位
🗣️ 情景例句
I've never been able to figure him out.
我一直不能理解他。
You don't need to interrupt!
不用你插嘴！
There were no classes this afternoon. My classmates all went to People's Park.
今天下午没有课。同学们都到人民公园去了。