Pentosamine
[化] 戊糖胺
🗣️ 情景例句
Things have worked out badly.
情况进展得很不理想。
Why are you laughing at me?
你为什么嘲笑我？
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。