Pentazine
[化] 五嗪
🗣️ 情景例句
Keep out of what doesn't concern you.
不关你的事不要插手。
But you just got here. Can't you stay a little longer?
不过你刚来呀。不能再呆一会了吗？
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。