(of a ball) rebounding up and down (球)跳动的 ■(informal)(of a cheque) returned by a bank because there are insufficient funds in an account to meet it (非正式)(支票)遭拒付被退回的 ■(of a baby) vigorous and healthy (婴儿)有活力的,健康的 ■lively and confident 活跃的,自信的 by the next day she was her usual bouncing, energetic self. 第二天,她又是原来那个自信而又充满活力的自己。