breaksthin
—phrasal verbwithbreakverbuk/breɪk/us/breɪk/broke|broken
towearnewshoesor use newequipmentforshortperiodsto make them morecomfortable
使（新物件等）经使用后逐渐合用；磨合
My newhikingbootswill begreatonceI'vebrokenthem in.我的新爬山靴穿合脚后将会很棒的。
US(UKrunsthin)
If youbreakin avehicle, you use itcarefullyandslowlyfor ashorttimewhen it is new, so that you do notdamageitsengine.
（小心缓慢地）试开（新车），使（新车发动机）试转