Shadowgraph
n. 投影术, 皮影戏, X光照相
🏥 医学释义
X 射线摄影，X 射线照片
🗣️ 情景例句
That's too bad. Bye.
太糟了。再见。
Do you have a room available?
你们有空房间吗？
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。