Underfill
n. [冶](孔型)未充满
🗣️ 情景例句
These are wonderful--
这些好得很--
Please sign a copy of our Sales Contract No.156 enclosed here in duplicate and return to us for our file.
请会签第156号销售合同一式两份中的一份，将它寄回我方存档。
It's dangerous!
危险！