She tapped the door with her knuckles.

她用指节轻轻叩门。

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On her way home she tapped the steering wheel and started listing reasons that might help her make a decision.

回家的路上，她手指轻击着方向盘，把对做决定有帮助的理由一一列举出来。

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She tapped on the world map with her pointer.

她用教鞭轻点在那张世界地图上。

《柯林斯英汉双解大词典》

In a rare move, Senate Republicans voted in December 2011 to block Halligan the first time she was tapped for the court, complaining the 46-year-old Ohio native was too liberal and would be an activist on the bench.

CNN: Obama judicial nominees likely to reignite controversy

In a rare move, Senate Republicans voted in December 2011 to block Halligan the first time she was tapped for the appeals court, complaining that the 46-year-old Ohio native was too liberal and would bring her "extreme" political views to the bench.

CNN: Obama nominee for federal appeals court withdraws

Even though she was just tapped to head the science department, she too will have to re-apply.

NPR: Teachers at Troubled School Face Job Loss