Diac
两端交流开关元件
🗣️ 情景例句
We're supposed to be there
我们应当先到那儿
Don't fly till you wings are feathered.
羽毛未丰不要飞。
It was stolen twenty years ago when Dan was a boy of fifteen!
这是20年前丹还是一个15岁的孩子时被人偷走的！