Understrata
n. 底层 (understratum的变形)
🗣️ 情景例句
I'll believe it when I see it.
我觉得还是眼见为实。
I was born in China and brought up in the U.S.A.
我出生在中国，在美国长大。
But they would not listen to him. When they came to the river, a white man was waiting in the boat for them.
但是他们不听，当他们来到江边时，一个白人正在船上等着他们。