| 单词 | palladium |
| 释义 | palladium[pə'leidiəm]n. 钯【化】 钯Pd【医】 钯(46号元素)【经】 钯金 palladium 1 palladium 1 AHD: [p…-l³“d¶-…m] D.J. [p*6le!di8*m]K.K. [p*6ledi*m]n.Symbol Pd （名词）符号 Pd A soft, ductile, steel-white, tarnish-resistant, metallic element occurring naturally with platinum, especially in gold, nickel, and copper ores. Because it can absorb large amounts of hydrogen, it is used as a purification filter for hydrogen and a catalyst in hydrogenation. It is alloyed for use in electric contacts, jewelry, nonmagnetic watch parts, and surgical instruments. Atomic number 46; atomic weight 106.4; melting point 1,552&9{=}C; boiling point 3,140&9{=}C; specific gravity 12.02 (20&9{=}C); valence 2, 3, 4.See table at element 钯：一种柔软的，易拉长的，银白色的，保持光泽的金属性元素，常与铂共生，尤其在金、镍和铜矿中存在。因为它能吸收大量氢，常用作除氢的过滤器或氢化作用的催化剂。其合金可用于电子接触器、珠宝、无磁性表部件以及外科医用器具。原子序数46；原子量106.4；熔点1,552&9{=}C；沸点3,140&9{=}C；比重12.02（在20&9{=}C时）；化合价2，3，4参见 element语源:From Pallas [(discovered at the same time as the element)] 源自 Pallas[（与该元素同时被发现）] palladium 2 palladium 2 AHD: [p…-l³“d¶-…m] D.J. [p*6le!di8*m]K.K. [p*6ledi*m]n.（名词） 【复数】 pal.la.di.a[-d¶-…] 或 pal.la.di.ums 1. A safeguard, especially one viewed as a guarantee of the integrity of social institutions:保障：保卫，尤指被看作保证社会机关廉正的人：the Bill of Rights, palladium of American civil liberties.人权法案，美国公民自由的卫士2. A sacred object that was believed to have the power to preserve a city or state possessing it.帕拉狄昂女神的神像：一种圣物，被认为对持有它的城或州具保护的力量语源:1. Middle English Palladion [a statue of Pallas Athena believed to protect Troy] 中古英语 Palladion [据说可以保护特洛伊帕拉斯·雅典娜塑像] 2. from Old French palladion 源自 古法语 palladion 3. from Latin Palladium 源自 拉丁语 Palladium 4. from Greek Palladion 源自 希腊语 Palladion 5. from Pallas Pallad- [Pallas Athena] 源自 Pallas Pallad- [帕拉斯·雅典娜] |
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