To display extraordinary martial arts skills, particularly in agility and acrobatics, such as walking on walls and leaping over rooftops; to be highly skilled in lightness kung fu.
那位武林高手身轻如燕，走壁飞檐，在屋顶上如履平地。
That martial arts master was as light as a swallow, walking on walls and flying over eaves, moving across rooftops as if on flat ground.
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