Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
Would you please lead me to look around your factory?
您能领我参观一下工厂吗？
Don't whistle until you are out of the wood.
没有脱离险境，不要过早高兴。
I'd like to give you one of our new catalogs.
我们有新目录想给你