birthstone
/'bɜːθstəʊn/ /'bɜːrθstoʊn/
n. 
石
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foul-up, foumart, found, foundation, foundation stone, foundational, foundationer, foundationstone, founded, founder,
相似单词
birthparents, birthplace, birthrate, birthright, birthroot, birthstone, birthwort, biruet, biryani, bis,