palladium
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 4'; atomic weight 0'.4; melting point ,552=C; boiling point 3,40=C; specific gravity 2.02 (20=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4'；原子量0'.4；熔点,552=C；沸点3,40=C；比重2.02（在20=C时）；化合价2，3，4参见 element
来源：From Pallas [(discovered at the same time as the element)] 源自 Pallas[（与该元素同时被发现）]
palladium
palladium 2
n.（名词）【复数】 pal.la.di.a[-dô-…] 或 pal.la.di.ums 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：例句：the Bill of Rights, palladium of American civil liberties.人权法案，美国公民自由的卫士
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
来源：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] from Old French palladion 源自 古法语 palladion from Latin Palladium 源自 拉丁语 Palladium from Greek Palladion 源自 希腊语 Palladion from Pallas Pallad- [Pallas Athena] 源自 Pallas Pallad- [帕拉斯·雅典娜]
