but then
词形变化：
副词: busily | 形容词比较级: busier | 形容词最高级: busiest | 名词: busyness | 动词过去式: busied | 动词过去分词: busied | 动词现在分词: busying | 动词第三人称单数: busies |
同义词：
engaged | active | eventful | diligent | full | demanding | hard | tiring | unavailable | on the go | hard-working | hard at it | working | fussy | occupy | occupied | abstracted | work | hum | employ | hectic | adorned | the | on | on the job | job | industrious | assiduous | sedulous | in use | busybodied | meddling | officious | meddlesome | interfering |
反义词：