男朋友: boyfriend...
轨迹: locus, orbit, trajectory, track...
再三: over and over again, again and again...
落成: to complete a construction project...
留下: to leave behind, to stay behind, to remain, to keep, not to let (sb) go...
动感: sense of movement (often in a static work of art), dynamic, vivid, lifelike...
探索: to explore, to probe...
青蛙: frog, (slang) ugly guy...
对应: to correspond, a correspondence, corresponding, homologous, matching with sth, counterpart...
辈: lifetime, generation, group of people, class, classifier for generations, (literary) classifier for people...
