Diac
两端交流开关元件
🗣️ 情景例句
I'm so glad.
我真高兴。
What are you playing?
你正在玩什么？
But this is not a business that can be undertaken in a day or swiftly improvised by a mere command of the will.
但这并非一日之功，也不是单凭意志一蹴而就的事。