| be sure about | 对……很有把握 |
| be sure to do | 一定做某事；确定做 |
| bean curd | 豆腐(高考词汇) |
| beat down | 打倒；杀价；大雨倾盆而下；暴晒 |
| beat up | adj. 年久失修的；残破的 , v. 暴打，痛打 |
| because of | 因为；由于 |
| before long | 不久;很快 |
| begin with | 以…开始；开始于… |
| bend down | 俯身 |
| bend over | 弯腰；折转 |
| block out | 挡住，遮挡；设法忘记 |
| block up | 阻碍；阻塞 |
| blow out | 吹熄；爆裂 |
| blow over | 平息；被淡忘；消散 |
| blow up | 爆炸,炸毁；使充气 |
| break a promise | 违背承诺 |
| break away | 挣脱；逃脱；摆脱 |
| break down | 分解；发生故障 |
| break into | 闯入；破门而入 |
| break out | 爆发；突发 |