to expand and contract in a rhythmic mannerher heart pit-a-patted with surprise
her heart pit-a-patted with surprise
beat, palpitate, pitter-patter, pulsate, pulse, throb
fluctuate, oscillate, vibratequiver, tremble
in 1582
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。