Triacs
三端双向可控硅元件
🗣️ 情景例句
I'm sorry you have to leave so soon.
很遗憾你不能多呆会儿。
Newspapers keep us in contact with the events of the world.
报纸是巨大的信息来源，互联网也不能取代它的地位。
The change between hot and cold temperatures makes the blood move around the shoulder and the damaged parts begin to repair themselves.
冷热交替使肩膀周围的血液循环，受伤的部位开始自己修复。