Backgrounds
n. 背景图片, 背景（background的复数形式）
🗣️ 情景例句
We are four in all.
我们家共有四口人。
I have a lot of responsibility in my job.
我的工作责任重大。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，