Underfill
n. [冶](孔型)未充满
🗣️ 情景例句
So just relax.
所以 ，放轻松点。
I agree. I wish it were quicker.
是这样，我希望它能快一点。
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。