Diac
两端交流开关元件
🗣️ 情景例句
Do you ever think about your clildhood?
你回忆过童年吗？
In all things, it is better to hope than to despair.
凡事抱希望为佳，不应悲观而失望。
While two detectives were keeping guard at the door, two others opened the parcel.
这时两个侦探把住门口，另外两个侦探打开了包裹。