Pyrazolone
吡唑啉酮
🗣️ 情景例句
How did you feel?
感觉怎么样？
I'm not strong enough.
我还不够强壮。
it was not long before its use as the uniquely recognizable broadcasting frequency for interstellar communication was suggested.
提出把它作为星际间唯一可辨认的广播频率就为期不远了。