DICT.TW Dictionary Taiwan

 雷聲大，雨點小 [ㄌㄟˊ ㄕㄥ ㄉㄚˋ , ㄩˇ ㄉㄧㄢˇ ㄒㄧㄠˇ; lei2 sheng1 da4 , yu3 dian3 xiao3]
 loud thunder, but only tiny drops of rain (idiom); a lot of talk, but no action
 action speaks louder than words
 his bite is worse than his bark
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