无庸讳言[wú yōng huì yán]
词典no need for reticence：毋庸讳言；无庸讳言。
词典be frank：无庸讳言；敞胸露怀。
no need for reticence; be frank
1. 无庸讳言
1. It is no secret that：It is well-known that... 众所周知 | It is no secret that... 无庸讳言 | It must be pointed out that... 必须指出的是......