Dictionary Entry: 钻牛角

lit. honing a bull's horn; fig. to waste time on an insoluble or insignificant problem ꞏ to bash one's head against a brick wall ꞏ a wild goose chase ꞏ a blind alley ꞏ to split hairs ꞏ same as idiom 鑽牛角尖|钻牛角尖