bounce up and down

• • 蹦蹦跳跳，跳上跳下：

    Tell the children not to bounce up and down on the bed.

    告诉孩子们别在床上蹦跳。

  • (球)跳起跳落：

    He bounced the ball up and down

    他拍得球跳起跳落。(或：他把球拍得上下弹跳。)