n. 
箱树素
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bulla,
bullace,
bullae,
bullarium,
bullate,
bullatine,
bullback,
bullbaiting,
bullbat,
bull-bear,
相似单词
cephacoria,
cephaeline,
cephal-,
cephalad,
cephalalgia,
cephalanthin,
Cephalaspida,
cephalate,
cephalated,
cephaledema,