emerald [ˈemərəld]

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n.翡翠，绿宝石，翡翠绿，翠绿色；adj.祖母绿的

a bright green transparent precious stone which is often used in jewellery

Alice has an emerald necklace.艾丽斯有一串绿宝石项链。
That emerald curtain doesn't match the floor.那翠绿色的窗帘和地板很不相配。