waste one's breath
... ups and downs 盛衰,浮沉 waste one's breath 白费唇舌 You can't beat it. 这是第一流的,比不上的。 ...
Whistle Down the Wind
... 白费唇舌 waste one's breath ; to waste your breath on him ; whistle down the wind 白费等待 Waiting in Vain 白费劲 beat a dead horse ...
You are just beating a dead horse