Let's say, plus, minus, five years.

我们就假设, 加减五年内。

And one standard deviation above the mean is 10 plus minus 5 is 5.

高于平均值的一个标准差是 10 加负 5 是 5。

The exposure can be accessed in two ways. One is this way that I've just showed you along the Bottom bar by swiping up and tapping on the little plus minus.

曝光有两种方式。一种是我刚才展示的沿着底部栏向上滑动并点击小加号减号的方式。