translation.en: We're not going to put the brakes on in time to stop at 450, so we've got to accept we're going to do an overshoot, and the discussion as we go forward has to focus on how far the overshoot goes and what's the pathway back to 350.
translation.zh: 我们并不打算及时踩刹车以停在450ppm， 所以我们得接受二氧化碳浓度将冲过头的事实， 并且正如我们将要进行的讨论 必须集中在这个“头”究竟过了多少， 我们如何能够让它降低到350。