a wild goose chase
榆黄守瓜 xanthogaleruca luteola 钻牛角 to bash one's head against a brick wall; a wild goose chase 钻牛角 to bash one's head against a brick wall; a wild goose chase; ; to split hairs; a blind alley ..
a blind alley
... to make fire 钻牛角 to bash one's head against a brick wall; a wild goose chase; a blind alley; to split hairs 钻牛角尖 to bash one's head against a brick wall; a wild goose chase; a blind alley; to split hairs ..
to split hairs
...by means fair or foul 钻牛角 to bash one's head against a brick wall; a wild goose chase; a blind alley; to split hairs 钻取 drill through; drilling; drillthrough ..