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音节分段：Lo.ba.chev.ski; AHD音标：l?”b…-chμf“sk?, l…-b…-chyμf“-Nikolai Ivanovich (1792-1856); 国际音标：7l*&b*6t.efski8, l*b*6t.jef-; 美国音标：7lob*6t.Wfski, l*b*6t.jWf-; Russian mathematician who developed (1826) hyperbolic geometry, a system that challenged Euclidean theory.