He rapped his knuckles again as he tried to pick it up.

哈尔准备捡起刀时，桑顿又朝哈尔的手背敲了一下。

Thornton rapped Hal's knuckles with the axe-handle, knocking the knife to the ground.

哈尔的手背刚一被桑顿那根斧头柄敲了一下，刀就应声落地。

Peter went in and rapped his knuckles on it to make sure that it was solid.

彼得走进去，还用指关节在板上敲敲，看看这板是否结实。

Dropping the coal, Georgie rapped his knuckles on the door and ran back to Papa.

乔吉扔下煤炭，用指关节敲打门，然后跑回爸爸身边。