🧩 词语组成解析
n. 咖啡因;茶精(兴奋剂)
🗣️ 情景例句
We have two and a half hours.
还有两个半小时。
Oh, thank you.
噢,谢谢了。
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。