-(从头起;着手进行)begin;start;initiate;commence:
takeeffect;comeintoeffect;开始生效
startfromtheverybeginning;从头开始
-(开始阶段)initialstage;beginning;outset;inception;initiation;onset;dawning:
atthecommencementofthetwentiethcentury;20世纪开始时
soonafterthestartofthewar;战争开始后不久