Fouris富里fournum.四Four-step Linear method四步法four colour gravure press四色凹版印刷机four level forecast model四级预测模型four kinds of mentalities四种智力four dimensional geometry四维几何four-channel multiplier四通道乘法器four-lane toll facility四线征收通行费设施four-bearing crankshaft四轴承曲轴Four plus five is nine.四加五等于九。four hundred and nineteen(=419) 四百一十九