灰色圈 meaning in Chinese
chill ring
Examples
- The centres of the red , blue and grey circles are the forecast positions of the tropical cyclone at different times ( as shown at the upper left corner of the figure ) . the radii of the circles are the respective average forecast errors
红色、蓝色及灰色圈的中心表示该热带气旋在不同时间的预测位置(时间显示在图左上方) ，半径为相应预测位置的平均误差。