中文拼音： zuan1 niu2 jiao3 jian1

中文繁体： 鑽牛角尖

英文翻译： lit. to penetrate into a bull's horn (idiom); fig. to waste time on an insoluble or insignificant problem/to bash one's head against a brick wall/a wild goose chase/a blind alley/to split hairs