求翻译：缓冲器是用来缓和及吸收纵向冲击和振动能量，从而减轻对车体结构和装载货物的损伤，提高列车运行的平稳性。是什么意思？

Buffers are used to ease the longitudinal shock and vibration absorption and energy, so as to reduce injury to the body structure and loading cargo, improving the stability of train operation.