Serrasoid
锯齿波(调制)
🗣️ 情景例句
The apples?
苹果吗？
Let's see you do it!
有本事你做给我看！
So archaeologists have neither history nor legends to help them to find out where the first 'modern men' came from.
于是，考古学家们既缺乏历史记载，又无口头传说来帮助他们弄清最早的“现代人”是从哪里来的。