健身: to exercise, to keep fit, to work out, physical exercise...
大哥: eldest brother, big brother (polite address for a man of about the same age as oneself), gang leader, boss...
渔民: fisherman, fisher folk...
灵活: flexible, nimble, agile...
钥匙: key...
告辞: to say goodbye, to take one's leave...
咋: dialectal equivalent of 怎麼|怎么（zěn mo）...
句: sentence, clause, phrase, classifier for phrases or lines of verse...
惊险: thrilling, a thriller...
咳: cough...
