adj. 
有前部的,

有正面的
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blvd.,
Blymphocyte,
B-lymphocytes,
Blythe,
BM,
BMA,
BMAC,
B-magnitude,
BMC,
BMD,
相似单词
frontier,
frontierless,
frontiersman,
frontispiece,
frontlash,
frontless,
frontlessly,
frontlessness,
frontlet,
frontlighting,