身ㄕㄣshēn輕ㄑㄧㄥqīng如ㄖㄨˊrú燕ㄧㄢˋyàn

  1. 形容體態輕盈靈活。如：「他每日都勤於鍛練身體，爬起山來自然身輕如燕。」

英as lithe as a swallow (of athlete or beautiful girl)​