Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
My brother is a junk food addict.
我兄弟就爱吃垃圾食品。
Where were you yesterday afternoon?
你昨天下午在哪儿？
Suddenly, a middle-age lady got on the train and sat opposite Sally.
突然，一个中年妇女上了火车，坐在萨莉的对面。