cesium label text label

entity.label={          

            text : parseFloat(airdata[curAirParaName]).toFixed(2),
            color : Cesium.Color.fromCssColorString('#fff'),
            font:'normal 32px MicroSoft YaHei',
            showBackground : true,
            scale : 0.4,
            /*horizontalOrigin : Cesium.HorizontalOrigin.LEFT_CLICK,*/
            /*verticalOrigin : Cesium.VerticalOrigin.BOTTOM,*/
            distanceDisplayCondition : new Cesium.DistanceDisplayCondition(0, 500),
            /*disableDepthTestDistance : 1000*/

            /*Represents a scalar value's lower and upper bound at a near distance and far distance in eye space.
            Name	Type	Default	Description
            near	Number	0.0	optional The lower bound of the camera range.
                nearValue	Number	0.0	optional The value at the lower bound of the camera range.
            far	Number	1.0	optional The upper bound of the camera range.
                farValue	Number	0.0	optional The value at the upper bound of the camera range.*/
            scaleByDistance : new Cesium.NearFarScalar(100, 2, 500, 0.0),
        }