informalINTELLIGENTable to think or act quickly and intelligently 机灵的,聪明的
an assistant who’s really on the ball
一名非常机灵的助手
Examples from the Corpus
on the ball• The cricketer himself seems intent on something earlier; back on the ball by June.• The thinking behind that extrahalfinch was it would give me better platecoverageon the ball away.• Parks is a man who knows how to keep his eye on the ball.• Calluses grow on the ball of the foot and do not have a nucleus.• They were the black men who did, indeed, have it on the ball.• Super slow-motion replaysappeared to show O'Driscoll did not applydownwardpressureon the ball.• There seemed to be no time on the ball, and poor Dylan Kerr was run ragged down the right wing.• He was turning on the ball right away against veteranpitchers.• A photographer who was on the ball got some great pictures of the incident.