In 1924 he convinced the British government to encircle the world with a chain of wireless stations using the latest technology that he had devised, shortwave radio.
1924年，他说服英国政府用他最新发明的短波无线电技术来建立无线电台链，环绕世界。
2
Sergio: My friend told me that there is a new short signal radiotechnology.
塞吉奥：我的朋友告诉我，现在有一种新的短距离无线通信技术。
3
However, in recent years wireless sensors have become practical, thanks to the miniaturization of electronics and improvements in battery and radiotechnology.