Underswing
负脉冲(信号)(瞬态特性), 负尖峰(信号)
🗣️ 情景例句
Here are the financial details on the house.
这是这房子的财务细节。
I have a toothache.
我牙好痛。
Don't you usually come to school by bike?
你不是常骑自行车到学校吗？