音标：[ɪrɪ'dɒzmɪəm] ；

n. 铱锇矿

n. The native compound of iridium and osmium. It is found
in flattened metallic grains of extreme hardness, and is often used for
pointing gold pens.

[单词解析速记].JV447.(Yoke.and.Vapid)

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the Perseid meteor shower

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A Midshipman

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China's new Internet ID policy triggers online discussion

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学英语单词

achievement-related

acne detergicans

actual final condition

civil aeronautics authority