Satellorb
模拟人造卫星的观察与研究气球
🗣️ 情景例句
I always wanted to travel to Europe but I was afraid that language would be a problem.
我总想去欧洲旅游，但我又怕语言是个问题。
The wife is the key of the house.
妻子是一家的钥匙。
Don't give me your excuses.
别找借口。