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N-UNCOUNT(不可数名词) Tic-tac-toe is a game in which two players take turns in drawing either an "O" or an "X" in one square of a grid consisting of nine squares. The winner is the first player to get three of the same symbols in a row. 井字棋 [美国英语]
...a game of tic-tac-toe.
...一盘井字棋。