Circulus umbilicalis
[医] 脐动脉丛
🧩 词语组成解析
[医] 环, 圈
🗣️ 情景例句
Nice to meet you.
很高兴见到你。
You can't stay in bed, darling!
亲爱的，你不能老呆在床上呀。
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。