rhythmically       
adverb uk/ˈrɪð.mɪ.kəl.i/ us/ˈrɪð.mɪ.kəl.i/
 有节奏地;有规律地
in a way that has a regular, repeated movement or beat
  Try to breathe deeply and rhythmically. 试试有节奏地深呼吸。 
 The group rhythmically chanted, "No more cuts!" 一群人有节奏地高呼:“反对削减经费!” 
 See: rhythmic
 - More examples
 - The baby was breathing rhythmically.
 - She had a rhythmically charged performance style.
 - The van's lights were flashing and the horn was beeping rhythmically.