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。
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