| 释义 |
〔Wells〕American dentist who pioneered the use of nitrous oxide as an anesthetic.韦尔斯,霍勒斯:(1815-1848) 美国牙医。他研发了一氧化氮用作麻醉剂的方法〔Armstrong〕American engineer and inventor whose improvements to radio communication included the development of frequency modulation (1933).阿姆斯壮,艾德温·霍华德:(1890-1954) 美国工程师和发明家,他改进了无线电通讯包括研发调节频率(1933年) |