Back at their alma mater, every alumnus was deeply stirred.
Tips
memory
心潮 ('heart-tide') + 起伏 ('rise and fall'): your heart is an ocean and the waves are coming in. Per 《新华词典》, 心潮 = 比喻不平静的心情，以其如潮水起伏 — 'a metaphor for an unsettled mood, like the rising and falling of tide-water'.
