1、Iridium is a dense, silvery-white transition metal with a very high melting point.
铱是一种密度大、银白色的过渡金属,具有非常高的熔点。
2、The use of iridium in spark plugs greatly improves the durability and performance of the engine.
在火花塞中使用铱可以极大地提高发动机的耐用性和性能。
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