单词：burrs
n. 毛边；过火砖（burr的复数形式）
n seed vessel having hooks or prickles
n rough projection left on a workpiece after drilling or cutting
n United States politician who served as vice president under Jefferson; he mortally wounded his political rival Alexander Hamilton in a duel and fled south (1756-1836)
n rotary file for smoothing rough edges left on a workpiece
n small bit used in dentistry or surgery
v remove the burrs from
n rough projection left on a workpiece after drilling or cutting
n United States politician who served as vice president under Jefferson; he mortally wounded his political rival Alexander Hamilton in a duel and fled south (1756-1836)
n rotary file for smoothing rough edges left on a workpiece
n small bit used in dentistry or surgery
v remove the burrs from