在Excel中使用x-y散点图的时间数据进行散点图，不需要转换成数据序列

I have data for the x and y coordinates that are based on time ("hh:mm:ss") for an x y scatterplot for excel. Although I have put the x-axis data and y-axis data in adjacent columns and have highlighted them both when choosing the scatterplot, the excel continues to recognize the data not as x and y coordinates but two independent data series. How can I make the excel scatter plot program recognize the data as x axis and y-axis data points and not data series (independent variables)?I have data for the x and y coordinates that ar