Dr. Jeffrey Adelglass measures the pollen count for the Dallas, Texas, area. He said unseasonably warm temperatures led to relatiely high leels of cedar and elm pollen.

• Jeffrey Adelglass博士测量得克萨斯州达拉斯地区的花粉数量。他说，不合理的温暖天气带来相对大量的雪松和榆树花粉。