تعريف هذا العبارة كما قال(ت) جارا. لا أعرف كيف نقول هذا الشيء في سياق السيارات، لكن قد تتضح الفكرة إذا أعطيتك مثالا آخر:ـبالنسبة للسيارات الجديدة Break in ماذا تعني
It still applies today! Not exceeding a speed isn't so important as keeping RPMs down. You also need to get the oil changed more often the first few thousand miles because of all the metal shavings that end up in the oil as a result of breaking the engine in.In the old days when you bought a new car you were told to be careful driving it for a few weeks or a couple thousand kilometers. Being careful meant taking time to warm up the engine before driving the car and not exceeding a given speed limit. This was said to lengthen engine life. That's what breaking in means.