Oh! Good afternoon. Mr. Wilson, I'm sorry, but he's not in. He's gone out on business.
哦,您好!威尔逊先生。很抱歉,他不在家,他出差了。
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。