You see, the river starts off cold. It then heats up, cools back down, heats up, cools back down, heats up again, and then has this beautiful decay curve until it smashes into this cold river.

你看，这条河的河口是冷水。 接下来逐渐升温，再降温，再升，又降， 再次升温，于是有了这些可爱的衰减曲线， 直到最后奔腾进冰冷的河水中。