1. 釘是釘，鉚是鉚 (dīng shì dīng mǎo shì mǎo)

   1. 形容辦事認真,一絲不茍。也作“丁是丁,卯是卯” be accurate in what one works;be conscientious and meticulous

釘是釘，鉚是鉚是成語。