Satellorb
模拟人造卫星的观察与研究气球
🗣️ 情景例句
He doesn't enjoy going to school.
他不喜欢上学。
A word spoken is an arrow let fly.
一言既出，驷马难追。
After all, I am the only one of my aunt's relations still alive.
不管怎么说，我是我伯母的亲戚中唯一一个还活着的人。