space telegraphy的用法和樣例：
例句
- Wireless telegraphy, the phonograph and the radio are based on this law.
無(wú)線(xiàn)電報，留聲機和無(wú)線(xiàn)電廣播都基于這個(gè)法則。 - He experimented for years in his own laboratory,while he was still a young man, he invented wireless telegraphy.
他在他自己的實(shí)驗室里成年累月的作實(shí)驗，之后，當他還是個(gè)年輕人的時(shí)候，他發(fā)明了無(wú)線(xiàn)電報。
