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释义	prev. abbr.previous；previously
随便看	two level structure two-level structure two level subroutine two-level subroutine two-level supply chain two-levelsystem two level system two-level system two level tablespoonfuls of sugar two-level task schedule two-level teacher system two-level TOPSIS twolevel tread construction two level tread construction two-level-tree structure two-level tutorial system two level unsupervised method two level wiper two level wiper switching two-level wiper switching Two-level work pool twolf two liang of tea two liberties two liberty degree PID controller