platinum-iridium的意思|示意

As a result, the unit continued to be defined in explicit reference to a unique platinum-iridium ingot until 1960.

结果，直到1960年，这个计量单位都用一只独一无二的铂铱锭来标示。

Researchers spent three years developing the Zafirro Iridium, which has a handle made of 99.9 per cent pure iridium - the most corrosion-resistant platinum metal, found only in meteorites.

科学家用三年的时间研发这款“铱金蓝宝”，剃须刀柄由99.9%纯度的铱制成。 铱是抗腐蚀性最强的顶级金属，只能在陨星中找到。

Iridium, usually used in space rockets, is ten times rarer than platinum and highly resistant to heat so theoretically it can be dropped it into lava, and it will not melt.

铱，通常被用于太空火箭，比铂金稀有十倍并且高度耐热，因此理论上即使它掉进岩浆中也不会熔化。

In a laboratory vault outside Paris is a small cylinder of platinum-iridium alloy that serves as the standard for all mass measurements worldwide.

在巴黎郊外的一个实验室地下室中，有一个铂铱合金作的圆筒，这个圆筒就是作为世界上所有质量测量的标准。

The international primary standard for the kilogram is made of 90% platinum, 10% iridium.

重量和长度的国际标准原型用90%的铂，10%的铱制成。

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。