Convexoconcave
[医] 凸凹的
🗣️ 情景例句
Thanks to you, Richard,
谢谢你， Richard，
Whom will you vote for?
你将投票给谁？
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。