Legnum
翅瓣缘
🗣️ 情景例句
Rita Mae called yesterday. Rita Mae
昨天打电话来了。
Why are you so sad?
你为什么这样伤心？
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。