beginv.开始;着手
begin a discussion开始讨论
begin construction动工
begin cycle of luck开始了好运
Begin Air Refueling开始空中加油
begin to do the job开始做这件工作
begin at oneself atadj.忙于(忙着)
begin doing the job开始做这件工作
begin with the work先做这项工作
begin an experiment开始实验/试验
begin a competition开始比赛