时起时伏shí qǐ shí fú

now rise now fall; vary in intensity from time to time; have ups and downs
❍ 例如妥协的空气～，主张妥协者的根据就是“再战必亡”。(《毛泽东选集》409) For instance,from time to time an atmosphere of compromise arises and the advo cates of compromise argue that “the continuance of the war spells subjugation”.

时起时伏

on-and-off;remain a live issue;now rise,now fall;have ups and downs
围绕铀浓缩计划，国际斗争～。There were on-and-off international disputes over the uranium enrichment plan. or:International disputes over the uranium enrichment plan remained a live issue.

时起时伏shí qǐ shí fú

形容接二连三地起来。now rise, now fall; have up and down