persistent; persevering;persist in one’s purpose; unremitting ❍ 这一伟大理想，要经过许多代人～地努力奋斗才能最终实现。This great ideal can be finally realized only through persevering hard struggle over many generations.
坚持不渝jiān chí bù yú
渝：改变、变动。坚持到底，决不改变。persistent, persevering, hang on, be firm and unchanging