Paraquinoid
对醌型
🗣️ 情景例句
It's like an oven in here. Let's open the windows.
这里快成烤箱了，我们把窗子打开吧。
What's the longest river in the United States?
在美国最长的河是什么？
There's no time! laughed Mother.Here are the twins.
“没时间了！”母亲笑着说，“双胞姐妹到了。”