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- A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum,rhodium,and other metals,used in needles and wearing points. 铱锇矿一种矿石,是少量铂、铑及其他金属矿石的铱锇的自然合金,用于制造针头和耐磨尖端。
- A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum, rhodium, and other metals, used in needles and wearing points. 铱锇矿一种矿石,是少量铂、铑及其他金属矿石的铱锇的自然合金,用于制造针头和耐磨尖端
- Iridium probably does not occur uncombined in nature but it is found in natural alloys with other noble metals. 自然界中可能不存在纯铱,通常和其它贵金属共生于天然合金中。
- "It occurs rarely as a free metal, occasionally in natural alloys (especially in meteorites), and in hundreds of minerals and ores, including hematite, magnetite, limonite, and siderite. 地壳中游离铁很少见,而通常存在于合金(特别是陨石)及数百种矿物中,包括赤铁矿、磁铁矿、褐铁矿和菱铁矿。
- It is natural for a cat to catch mice. 猫捉老鼠是本能。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- Many natural materials are becoming scarce. 许多天然原料越来越少。
- Our motherland flows with natural resources. 我们祖国蕴藏着丰富的天然资源。
- Events took their natural course. 事态依自然进程发展。
- She has a natural wave in her hair. 她的头发自然卷曲。
- Magnetism is a natural phenomenon. 磁力是一种自然现象。
- It is difficult to be natural when one is tense. 人在紧张的时候很难泰然自若。
- The egoism of an artist sometimes seem natural. 艺术家的自负有时看起来是自然的。
- They used only natural pigments to dye the wool. 他们只用天然颜料染毛织品。
- Children are natural exhibitionists. 儿童天生喜欢自我表现。
- Everything we used was made from natural materials. 我们所用的一切都是由天然材料做成的。
- It's quite natural that you should succeed. 你的成功是很自然的事情。
- He's a natural for the role of Lear. 他是李尔王这一角色的理想人选。
- Most first-class footballers are natural athletes. 多数一流的足球运动员都是天生的健将。
- Only humans have a natural upright posture. 只有人类才有自然直立的姿势。