a transparent precious stone, typically blue, which is a variety of corundum (aluminium oxide)
蓝宝石
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[as modifier]
a sapphire ring .一枚蓝宝石戒指。
[mass noun]a bright blue colour
宝石蓝色,天蓝色。
a small hummingbird with shining blue or violet colours in its plumage and a short tail
蓝喉蓝胸红嘴蜂鸟。
"Middle English: from Old French