Background projection
[计] 背景投影
🧩 词语组成解析
projection
[prə'dʒekʃən]
n. 预测;规划，设计;[心]投射;突起物;
🗣️ 情景例句
Come on in.
请进。
It's a beautiful country with several chains of mountains.
这个国家很美，它有很多山脉。
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，