| 单词 | argon |
| 释义 | argon /ärˈgon/nounA colourless odourless inert gaseous element (symbol Ar; atomic no 18) discovered in the atmosphere in 1894 by Rayleigh and Ramsay. It constitutes about 1% by volume of the atmosphere, from which it is obtained by fractionation of liquid air, and is used in gas-filled electric lamps, radiation counters and fluorescent tubes ORIGIN: Gr ārgon (neuter) inactive, from a- (privative), and ergon work argon laser noun A laser using argon, which gives strong emission at 488.0, 514.5, and 496.5 nm |
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