Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
Hi, gang. Hi, everybody.
嗨 ，各位。
I think it's going to be too big.
我认为它将太大。
It is our satellite. It is quite near us in space.
它是我们的卫星。它离我们相当近，仅38万公里远。