Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
It's a family business, it may not bring in a lot of money, but it keeps the family together.
这是家族生意，虽然不一定可以赚大钱，但可将整个家庭凝聚在一起。
He has a sweeter.
他有一件毛衣。
I have pressing business to attend to.
我有紧急的事情要处理。