When we take a look at what this means, what we see is that this not only works if the middle passenger sneezes, but also if the window-seat passenger sneezes or if the aisle-seat passenger sneezes.
当我们再进一步看看它的效果， 可以看到这不仅在当中间位置的乘客 打喷嚏时有效， 也对窗边或者过道边的乘客 非常有效。