求翻译：造成刹车失灵的原因很多 ，一是对刹车系统缺乏必要的保养 ，刹车总泵里杂质太多 、密封不严 、真空助力泵失效 、刹车油过脏或几种刹车油混合使用受热后出现气阻 、刹车总泵或分泵漏油 、储气罐或管路接口漏气；二是由于操作不当导致机件失灵 ，如长时间下坡会使刹车片摩擦生热 、刹车毂炭化 、刹车功能完全失效；三是由于严重超载 ，在重力加速度的作用下 ，加大了车辆运动惯性 ，直接导致刹车失灵 。是什么意思？

Caused brake failure of causes many, a is on brake system lack necessary of maintenance, brake total pump in impurities too more, and seal not strict, and vacuum power pump failure, and brake oil had dirty or several brake oil mixed using heated Hou appears gas resistance, and brake total pump or min pump leakage oil, and storage gas tank or pipeline interface leak; II is because operation improper led parts failure, as long time downhill will makes brake tablets friction health hot, and brake hub carbonization, and brake function full failure; three is because serious overload, in acceleration of role Xia, increased has vehicles movement inertial, directly led brake failure.