| keep on | 重复；继续 |
| keep to | 遵守；履行 |
| keep up | 保持；继续；不低落；不落后 |
| keep up with | 赶得上；和…保持联系 |
| knock down | 击倒；撞倒；拆卸 |
| knock into | 撞上；与…相撞 |
| knock out | 使不省人事；使入睡；击败；淘汰 |
| knock over | 打翻；撞倒 |
| Lantern Festival | 元宵节 |
| lantern festival | 元宵节 |
| last but not least | 最后但同样重要的是,最后但并非最不重要 |
| last forever | 永远持续 |
| law and order | 法治；治安；遵纪守法 |
| lay off | 辞退，解雇 |
| learn about | 了解；学习 |
| learn and live | 活到老学到老；学无止境 |
| learn by heart | 记住；默记；背诵 |
| learn by oneself | 自学 |
| learn from | 向…学习 |
| learn of | 听说，听到；获悉 |