Flamper
煤层中的泥铁岩
🗣️ 情景例句
You should perform what you promised to do.
你应该履行诺言。
A tall tree is struck by lightning.
大树被闪电击中了。
The Hubble telescope was launched into space by NASA on April 20,1990 at a cost of over a billion dollars.
哈勃望远镜于1990年4月20日由国家航空航天局发射升空，耗资10多亿美元。