Diac
两端交流开关元件
🗣️ 情景例句
Before you leave--do I look all right?
在你们离开之前， 告诉我， 我这样子可以吗？
Action is the proper fruit of knowledge.
行动是知识的巧果。
I was doing eighty when I overtook you.
我是以第小时80英里的速度赶上你的。