PURE1 not mixed with anything else2 to make a substance pure3 not pureRELATED WORDScontaining no dirt or bacteria 没有污物或细菌的CLEAN (2)food, products etc that are produced without using chemicals 不使用化学物制作的食品、产品等NATURAL (2)1 not mixed with anything else 没有掺杂其他东西的pure /pjʊəʳ/ [adjective]not mixed with anything else 纯的；纯净的 The bottle contained 4 litres of pure alcohol. 瓶子里装有4升纯酒精。 When it first comes out of the ground, the oil is not very pure. 石油刚从地下开采出来时不是很纯。pure silk/wool/cotton Clothes made of pure cotton are much cooler than those made of mixed fibers. 纯棉制成的衣服比混纺制成的衣服凉快得多。20%/50% etc pure Crude cocaine is only about 25 percent pure. 未经加工的可卡因的纯度大约只有25%。purity [uncountable noun] The gold is then tested to determine its purity to determine how pure it is. 然后检测金子，判定其纯度。solid /ˈsɒlɪd, ˈsɒlədǁˈsɑː-/ [adjective only before noun]solid gold/silver/pine etcmade of gold, silver, wood etc that has not been mixed with any other metal or wood 纯金/银/松木等 a solid gold necklace 一条纯金项链 The antiques dealer guessed that the furniture was Victorian and solid mahogany. 古玩商猜测，那家具是维多利亚时代的，用纯红木做成。100% /ˌhʌndrɪd pəʳˈsent, ˌhʌndrəd pəʳˈsent/ [adverb]if something is100% beef,100% cotton etc, it is made only from beef or cotton, and has no other food or material added to it 百分之百的 The label said ‘100% wool’. 标签上注明“100%羊毛”。 The hamburgers at this restaurant are 100% beef. 这家餐厅里的汉堡包是用100%的牛肉做的。 a 100% graphite tennis racket 一只100%全碳素网球拍neat/straight /niːt, streɪt/ [adjective]if you have a strong alcoholic drink neat or straight, you do not mix it with another drink or with water 〔烈酒〕纯的 He always drinks his whisky neat. 他总是喝纯威士忌。 I'll have a straight vodka please. 请给我来一杯纯伏特加。unadulterated /ˌʌnəˈdʌltəreɪtɪd, ˌʌnəˈdʌltəreɪtəd/ [adjective]not mixed with other less pure substances 没有搀杂的，纯的 Nowadays more and more people are choosing to buy unadulterated organic food, which has been grown without pesticides and chemicals. 如今越来越多的人愿意购买纯有机食品，其生长过程中没有使用过杀虫剂和化学物质。2 to make a substance pure 使物质纯净purify /ˈpjʊərɪfaɪ, ˈpjʊərəfaɪ/ [transitive verb] You can purify water by boiling and filtering it. 你可以用煮沸和过滤的方式使水纯净。 It has been found that houseplants help purify the air. 人们发现室内盆栽植物有助于净化空气。 The solution is purified by passing it through a carbon filter. 这溶液经碳过滤装置净化。 a bottle of purified linseed oil 一瓶纯亚麻籽油refine /rɪˈfaɪn/ [transitive verb]to make a substance such as oil or metal pure using an industrial process 提炼；精制〔油、金属等〕 The oil is piped to the coast, where it is refined. 原油经管道输送到海岸，在那里提炼。 The dealers buy raw cocaine in the south, refine it here, and smuggle it into the north. 毒品贩子在南部买进原始古柯叶，在此地提炼成可卡因，然后私运到北部。 After the first refining process the metal is washed. 经过第一次提炼，金属被洗选干净。 refined petroleum 精炼过的石油distilBritish/distillAmerican /dɪˈstɪl/ [transitive verb]to make a liquid, for example alcohol or water, purer by heating it so that it becomes a gas and then allowing it to go cold again 蒸馏〔液体，如酒或水〕 My grandfather used to distil whisky on the farm. 爷爷过去常在农场里蒸馏威士忌。 The solution is distilled until it is 95% pure. 溶液经蒸馏，直至纯度达95%。 Only distilled water should be used for cleaning contact lenses. 只有蒸馏水才能用于清洗隐形眼镜。distillation /ˌdɪstɪˈleɪʃən/ [uncountable noun] Steam distillation is used to purify liquids. 蒸馏法用于纯化液体。3 not pure 不纯净的impure /ɪmˈpjʊəʳ/ [adjective]a substance that isimpure is not pure and contains other substances 不纯的；不纯净的 New laws restrict the sale of impure chemicals. 新制定的法律限制不纯化学品的销售。 The last sample was impure and quite useless for manufacturing purposes. 上一份样品不纯净，对于生产来说没有多大用处。impurity /ɪmˈpjʊərɪti, ɪmˈpjʊərəti/ [countable noun usually plural]something in a substance which should not be in it and which makes it not pure 杂质 Lime is added to the liquid metal to remove all the impurities . 往液态金属里加入石灰以去除所有的杂质。 There were impurities in the aluminum. 铝里面有杂质。