Underswing
负脉冲(信号)(瞬态特性), 负尖峰(信号)
🗣️ 情景例句
And when I did,
就算我睡着了，
The child is father of the man.
三岁定到老。
The distinction of our product is its light weight.
我们产品的特点就是它很轻。