coutn.标准输出COpref.共同；一起；联合abbr.公司（=company）abbr.郡；县（=county）abbr.指挥官（=Commanding Officer）Cocconeis fluminensisn.河口卵形藻co-seismic GPS data同震GPS观测数据co-planar waveguide共面波导co-planer condition共面条件coharmonic oscillator共谐波振荡器co-occurrence rules同现规则coctostable substance耐热物质covariant coordinates共变坐标co-dominant species共优种covariance proportion协方差比例