“雷声大，雨点小”，中文俗语，字面意思是“loud thunder but small raindrops”，比喻言语上夸大其词，但是却无实际作为（much said but little done）。与英文俗语“much cry and little wool”意思相近。

例句：

形式主义的特点是走过场，雷声大，雨点小。

What characterizes formalism is that it goes through the formality with much cry and little wool.