Areodesy
火星测量学
🗣️ 情景例句
I don't know. It's locked.
不知道， 锁着呢。
And what's that?
还有那是什么？
I want to take some books to the classroom. Could you help me, please?
我想把一些书拿到教室里，你能帮个忙吗？