A diadem is a small crown with precious stones in it.

(镶有宝石的)小王冠

柯林斯高阶英语词典

A diadem was worn as sign of royal power.

戴着的皇冠是王权的象征.

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The diadem is the symbol of royalty.

王冠就是王权的象征。

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Put the turban on his head and attach the sacred diadem to the turban.

6把冠冕戴在他头上、将圣冠加在冠冕上.

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Nature like us is sometimes caught without diadem.

自然犹如我等,时常没戴皇冠.

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