| 单词 | 稀有 |
| 释义 | 〔costly〕These adjectives apply to what brings a high price or is of great value.Costly, expensive, and dear refer principally to the cost entailed in acquiring something, costly especially implying high quality or rarity of the purchase: 这些形容词都指带有高价或价值高的。Costly，expensive 和 dear 主要指获得某物涉及的费用， costly 指购买品的质量上乘并稀有： 〔discriminating〕a discriminating collector of rare books; a dish for the discriminating palate.一位有鉴赏力的稀有书籍收集者；为美味鉴赏者而备的一道菜〔gallium〕A rare metallic element that is liquid near room temperature, expands on solidifying, and is found as a trace element in coal, bauxite, and other minerals. It is used in semiconductor technology and as a component of various low-melting alloys. Atomic number 31; atomic weight 69.72; melting point 29.78°C; boiling point 2,403°C; specific gravity 5.907; valence 2, 3. See table at element 镐：一种在室温下是液体的稀有金属元素膨胀成固化，通常作为煤、铝土岩和其它矿中的微量元素而存在。用于半导体技术和各种低融合金的合成。原子序数31；原子量69.72；熔点27.98摄氏度；沸点2,403摄氏度；比重5.907；化合价2，3 参见 element〔anorthite〕A rare plagioclase feldspar with high calcium oxide content occurring in igneous rocks.钙长石：一种氧化钙含量很高稀有斜长石，多出现于火成岩中〔alert〕bird watchers on the alert for a rare species.看守者人密切注意稀有鸟类〔radicchio〕Any of several prized varieties of chicory, having red or red-spotted leaves that form globose or elongated heads.菊苣：一种稀有的菊苣菜变种，叶有红点或叶呈红色，叶成球形或长形的头状〔variscite〕A rare, light to dark or bluish green, translucent mineral, Al(PO4)·2H 2O, found in aluminum-rich rocks and sometimes used as a semiprecious stone. 磷铝石：为稀有的、颜色从淡绿色到深绿或蓝绿不等的、半透明矿物，Al(PO4)·2H 2O，常见于富含铝的岩石中，有时用作准宝石 〔rarity〕The quality or state of being rare; infrequency of occurrence.罕见，稀有：少见的品质或状态；发生的次数不多〔nene〕A rare wild goose(Branta sandvicensis) of the Hawaiian Islands, having a grayish-brown body with a black face. 夏威夷雁，黄颈黑雁：夏威夷群岛的一种稀有野生大雁（黄颈黑雁） ，灰褐色身体，面部发黑 〔Celebes〕An irregularly shaped island of central Indonesia on the equator east of Borneo. The Portuguese first visited Celebes in 1512 but were ousted by the Dutch in the 1600's. The island is noted for its rare species of fauna.西里伯岛：位于赤道婆罗洲东部、印度尼西亚中部的不规则形状的岛屿。葡萄牙人于1512年首先登上西里伯岛，但在17世纪初被荷兰人赶出。该岛因其稀有的动物品种而著名〔anatase〕A rare blue or light yellow to brown crystalline mineral, the rarest of three forms of titanium dioxide, TiO2, used as a pigment, especially in paint. 锐钛矿：一种蓝色、淡黄到棕色的稀有晶体矿物，是二氧化钛，TiO2，三种形式中最稀有的一种，用作颜料，尤用在绘画颜料中 〔jadeite〕A rare, usually emerald to light green but sometimes white, auburn, buff, or violet mineral, NaAlSi2O 6, used as a gem and for ornamental carvings. It is the tougher and more highly valued form of jade. 翡翠石：通常指珍贵稀有的祖母绿宝石，有时也指白色、红褐色、暗黄色或兰紫色的矿石。NaAlSi2O 6，用作宝石或装饰性的雕刻作品。它是较为坚硬和较具有高价值的玉石的一种 〔radium〕A rare, brilliant white, luminescent, highly radioactive metallic element found in very small amounts in uranium ores, having 13 isotopes with mass numbers between 213 and 230, of which radium 226 with a half-life of 1,622 years is the most common. It is used in cancer radiotherapy, as a neutron source for some research purposes, and as a constituent of luminescent paints. Atomic number 88; melting point 700°C; boiling point 1,737°C; valence 2. See table at element 镭：一种稀有的、有白色光泽、发光、高度放射性的金属元素，极少量地存在于沥青矿中，有13种同位素，质量数介于213和230之间，最常见的为镭226，半衰期为1,622年。镭可用于癌症的放射治疗，在其它一些研究中用作中子源，还可用作发光颜料的成分。原子序数88；熔点700°C；沸点1,737°C；原子价2 参见 element〔bontebok〕A rare South African antelope(Damaliscus dorcas or D. pygargus) having a dark reddish coat, a white rump, and a white mark on the face. 南非羚羊：南非的一种稀有羚羊（南非白纹大羚羊 或 白腿牛羚） ，躯干呈深红色，臀部为白色，脸上有白色标记 〔shatter〕a rare piece of porcelain now in shatters.一件稀有的瓷器现在已经支离破碎了〔tritium〕A rare radioactive hydrogen isotope with atomic mass 3 and half-life 12.5 years, prepared artificially for use as a tracer and as a constituent of hydrogen bombs.氘：氢的放射性稀有同位素，原子量为3，半衰期12.5年，人工配制可用作指示剂和氢弹的组成部分〔antiquarian〕Dealing in or having to do with old or rare books.古文物研究收藏的：经营或有关古旧稀有书籍的〔protactinium〕A rare, extremely toxic, radioactive element chemically similar to uranium, having 13 known isotopes, the most common of which is protactinium 231 with a half-life of 32,480 years. Atomic number 91; melting point 1,230°C; specific gravity 15.37; valence 4, 5. See table at element 镤：一种稀有的、剧毒放射性元素，在化学性质上与铀相似。有十三个已知的同位素，其中最常见的是半衰期为32,480年的镤231。原子序数为91；熔点1,230°C；比重15.37；原子价4, 5 参见 element〔sapphirine〕A rare light blue or green aluminum-magnesium silicate mineral.假蓝宝石：一种稀有的浅蓝色或绿色的镁-铝硅酸盐组成的矿物〔panda〕A rare, bearlike mammal(Ailuropoda melanoleuca) of the mountains of China and Tibet (Xizang), having woolly fur with distinctive black and white markings. Also called giant panda ,panda bear 猫熊，熊猫：产于中国和中国西藏山区的一种稀有，象熊的哺乳动物（大熊猫） 毛皮上的花纹黑白分明 也作 giant panda,panda bear〔Byrd〕American planter and colonial official whose diaries (written in shorthand) provide a rare and humorous account of daily life in pre-Revolutionary Virginia.伯德，威廉：(1674-1744) 美国农场主和殖民地军官，其日记（速记体）提供了关于革命前夕弗吉尼亚州日常生活稀有而幽默的记录〔seldom〕Infrequent; rare.不常有的；稀有的〔rhenium〕A rare, dense, silvery-white metallic element with a very high melting point used for electrical contacts and with tungsten for high-temperature thermocouples. Atomic number 75; atomic weight 186.2; melting point 3,180°C; boiling point 5,627°C; specific gravity 21.02; valence 1, 2, 3, 4, 5, 6, 7. See table at element 铼：一种稀有的不透光银白色金属元素，具有非常高的熔点。用作电气触点，与钨用作高温热电偶。原子序数75；原子重量186.2；熔点3,180°C；沸点5,627°C；比重21.02；化合价1，2，3，4，5，6，7 参见 element〔rarefy〕rārus [rare] rārus [稀有的] 〔neon〕Symbol Ne A rare, inert gaseous element occurring in the atmosphere to the extent of 18 parts per million and obtained by fractional distillation of liquid air. It is colorless but glows reddish orange in an electric discharge and is used in display and television tubes. Atomic number 10; atomic weight 20.183; melting point -248.67°C; boiling point -245.95°C. See table at element 符号 Ne 氖：稀有的惰性气体元素，在空气中以百万分之十八的比例存在，液态空气经分馏后得到。常无色，通电流时发红橙光。用于屏幕和电视显像管。原子序数10；原子量20.183；熔点-248.67°C；沸点-245.95°C 参见 element〔sight〕hoping for a sight of land; caught sight of a rare bird.希望能看见陆地；看见了一种稀有鸟类〔house〕a library housing rare books.存有稀有书籍的图书馆〔economize〕the need to economize scarce energy resources.节约使用稀有能源的必要性〔Praxiteles〕Greek sculptor whose few surviving works includeHermes Carrying Dionysius, discovered at Olympia (1877). 普莱克西泰勒斯：希腊雕塑家，其现存的稀有的几部作品包括1877年在奥林匹亚发现的《手抱戴奥尼塞斯的赫尔墨斯》 |
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