translation.en: So if we continue on this red, four-degree centigrade scenario pathway, the longer we continue on it, that will need to be made up for in later years to keep the same carbon budget, to keep the same area under the curve, which means that that trajectory, the red one there, becomes steeper.
translation.zh: 所以如果我们继续沿着这条4℃红线， 在上面继续的时间越久， 之后就需要弥补的就越多。 来保持相同的碳预算， 使曲线下方的区域面积不变。 也就是说这条红色的轨迹 会变得更加陡峭。