birthstone
/'bɜːθstəʊn/ /'bɜːrθstoʊn/
n. 
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Biostat, biostatics, biostatistics, biostereometrics, biosterin, biosterol, biostrain, biostrategic, biostrategy, biostratigraphic,
相似单词
birthparents, birthplace, birthrate, birthright, birthroot, birthstone, birthwort, biruet, biryani, bis,