Ultraudion
(三极管)反馈线路, 三极管回授式检波器, 超三极管
🗣️ 情景例句
I don't know haw that could have happened.
我不知道怎么会发生那样的事。
Other men live to eat, while I eat to live.
别人为食而生活，我为生活而食。
The mobile phone is as popular as the beeper nowadays.
现在手机和寻呼机一样普及。