時(shí)起時(shí)伏
on-and-off;remain a live issue;now rise,now fall;have ups and downs
圍繞鈾濃縮計(jì)劃,國際斗爭~。There were on-and-off international disputes over the uranium enrichment plan. or:International disputes over the uranium enrichment plan remained a live issue.
時(shí)起時(shí)伏shí qǐ shí fú
形容接二連三地起來。now rise, now fall; have up and down