Underswing
负脉冲(信号)(瞬态特性), 负尖峰(信号)
🗣️ 情景例句
Do you ever think about other people?
你从来就不考虑考虑别人吗？
His leg is wounded, Does it hurt?
他的腿受伤了，疼不疼？
That rings a bell.
我总算想起来了。