Wireless telegraphy, the phonograph and the radio are based on this law. 无线电报，留声机和无线电广播都基于这个法则。
He experimented for years in his own laboratory,while he was still a young man, he invented wireless telegraphy. 他在他自己的实验室里成年累月的作实验，之后，当他还是个年轻人的时候，他发明了无线电报。
