Age diminishes the heart's ability to pump harder and faster under exertion.随着年龄的增加，人在消耗体力时心脏的输血能力和输血速度会有所减弱。The inaccuracy of the missiles greatly diminishes their effectiveness.这些导弹的不精确性大大减弱了其效果。This innate immunity diminishes when birds are stressed by cold.鸟在受冻时，这种内在免疫力会逐渐减小。