Perfluoropropylene
[化] 六氟丙烯; 全氟丙烯
🗣️ 情景例句
Seven o'clock, I'll pick you up at your office.
晚7点，我去办公室接你。
To tear down buildings
破坏大楼
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，