无须

这件事情的来龙去脉大家都心知肚明，你无须再做过多解释。

zhè jiàn shì qíng de lái lóng qù mài dà jiā dōu xīn zhī dù míng, nǐ wú xū zài zuò guò duō jiě shì.

Everyone knows the ins and outs of this matter, so you don’t need to explain too much.