Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
I was a member of the debate team.
我是辩论队的成员。
It's essential to choose the right means of transportation.
选择合适的运输方式很重要。
If it were gentle, only the more unstable rods fell.
如果地震轻微，只有不稳定的木棒倒下；