Infrastructrue
n. 深部构造；基底；下地壳层；下部结构设施
🗣️ 情景例句
Good morning. This is Huang Feng.
早上好，我叫黄凤。
There's a chance he won't be able to be home for Christmas.
他不能回家过圣诞节有偶然性。
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，