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 钻圈 jumping through hoops (a...
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?钻牛角
...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 ..