move in cycles; repeat itself in cycles ❍ 实践、认识、再实践、再认识，这种形式，～以至无穷，而实践和认识之每一循环的内容，都比较地进到了高一级的程度。(《毛泽东选集》273) Practice,knowledge,again practice,and again knowledge.This form repeats itself in endless cycles and with each cycle the content of practice and knowledge rises to a higher level.
循环往复xún huán wǎnɡ fù
循环：事物周而复始地变化或运动。周而复始，来来回回。形容反反复复，接连不断。go and return in following a circle, move in circles