Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
Oh, Susan, thank you so much
噢 ，Susan ，谢谢你。
If you lose your way, ask a policeman.
如果你迷路了，可以向警察打听。
We'll see his boat and then we'll say goodbye to him.
我们将参观他的船，然后和他告别。