改变一个习惯会留下一个真空地带，所以我们用另一个习惯来顶替它。
One way to change a habit is to replace the vacuum it may leave in your life with another habit. So instead of watching TV that extra hour each day you may.
其一，气候改变对地球而言是确实的威胁，所以我们不要被计划绕晕了，把反弹效应当成一个借口而不去面对它。
Firstly, climate change is a real threat to our planet, so we must not get overwhelmed by the task and use rebound effects as an excuse not to act.
我很清楚，接触面面积会在撞击过程中发生改变——所以我要试着估算出它的具体值。
I know this area should actually change during the collision -so I am just going to estimate it.
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