translation.en: Now, if you're on the equator here -- that's these two lines here, the red line and the purple line -- the amount of nitric oxide that's released is the area under the curve, it's the area in this space here.
translation.zh: 如果你在赤道地区 也就是这两条红色和紫色的线 线下方的区域代表一氧化氮的释放量 也就是这片区域