思潮起伏

thoughts surging in one's mind (idiom) / different thoughts coming to mind

to think / to consider

tide of thought / way of thinking characteristic of a historical period / Zeitgeist

tide / current / damp / moist / humid

tide / damp; moist; humid / fashionable; trendy / (coll.) inferior; substandard

to rise / to raise / to get up / to set out / to start / to appear / to launch / to initiate (action) / to draft / to establish / to get (from a depot or counter) / verb suffix, to start / starting from (a time, place, price etc) / classifier for occurrences or unpredictable events: case, instance / classifier for groups: batch, group

to move up and down / to undulate / ups and downs

surname Fu

to lean over / to fall (go down) / to hide (in ambush) / to conceal oneself / to lie low / hottest days of summer / to submit / to concede defeat / to overcome / to subdue / volt