be busy with

• He 's been busy with this for quite a few days ..
  他为了这个忙了好几天。
• He is busy with proving up a coal deposit .
  他正忙于勘探煤层。
• Aunt li is busy with the affairs of the street committee all day long ; you can hardly ever find her at home .
  李大娘成天忙着街道的事儿，家里见不到她的人影儿。
• Many a student is busy with their lessons
  许许多多的学生都忙着复习他们的功课。
• The refresher is busy with another operation
  刷新程序正忙于进行另一个操作。
• I have been busy with my investigation since monday
  自星期一以来，我忙于调查工作。
• The minister is busy with important affairs of state
  部长忙于重要国务。
• Her father is busy with his work all the time
  23她爸爸一直在忙于工作。
• They are busy with the preparation for the final examination
  他们在忙于期末考试前的准备。
• He is busy with his scientific experiment and research work
  他忙于他的科学实验和研究工作。