adj. 

的,倒退的
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Burberry,
Burbidge,
burble,
burbling,
burbot,
burbs,
burbulence,
Burchfield,
burclover,
burd,
相似单词
retrovaccine,
retroverse,
retroversioflexion,
retroversion,
retrovert,
retroverted,
retrovirus,
retrude,
retrusion,
retrusive,