您要查找的是不是：
- It contains an oxygen atom in a rare oxidation state of 0, due to the electronegativity of oxygen, which is higher than that of chlorine but lower than that of fluorine. 它包含一个氧原子的一种罕见的氧化态为0 ，由于电的氧，这是高于氯，但低于氟。
- It was in the days when motorcars were rare. 那是在汽车还罕见的时代。
- How can you get rid of this oxide coating? 你们该怎样除去这些氧化皮？
- A top hat is a rare sight these days. 高顶大礼帽现在已不多见。
- I must admit I am very fond of collect rare book. 我得承认我很喜欢海内珍本。
- It's very rare for him to be so late. 他很少迟到。
- A mixture of black manganese oxide minerals. 硬锰矿一种黑色氧化锰矿的混合物
- Red squirrels are now very rare in Britain. 红色的松鼠在英国已十分罕见了。
- A gaseous anesthetic, such as nitrous oxide. 气体麻醉剂一种气态的麻醉剂，如一氧化二氮。
- The white-lipped deer are rare in this area. 白唇鹿在这个地区很罕见。
- These rare tigers are protected by special laws. 这些珍贵的老虎受到专门法律的保护。
- This rare bird has become an endangered species. 这种珍禽已成为濒临灭绝的物种。
- A rare smile lit up his stern features. 他那难得一见的微笑在他死板的脸上平添一些生气。
- It is rare to find such a genius nowadays. 这样的天才现在很少见。
- He is which is rare for him, in a bad temper. 他在发脾气，这对他来说是很少见的。
- Many kinds of wild orchid are becoming rare. 很多种野生兰越来越罕见了。
- Keywords multiwall carbon nanotubes;Eu2 O3;composite;rare oxide;chemistrcal precipitation method; 碳纳米管;氧化铕;复合材料;稀土氧化物;化学沉淀法;
- These flowers are very rare in this country. 这些花在该国很少见。
- Rare comestibles are on sale in this market. 这个市场卖稀有食品。
- Edison had rare powers as an inventor. 爱迪生具有罕见的发明天才。
