1.foolhardy ADJ
taking unnecessary risks
莽撞的；有勇無謀的
仿 She paid for the foolhardy act with her life.
原No normal person would ever do something so foolhardy.
2.tighten up
If a group, team, or organization tightens up, they make an effort to control what they are doing more closely, in order to become more efficient and successful.
使紧密；拉紧；使更牢固；加紧工作;加强管理;严格要求
仿He wants us to be a bit more sensible this time and tighten up.
原After I passed that point, and as I was coming up on thirty-one miles, I felt a slight change physically, as if the muscles of my legs were starting to tighten up.
3.excruciating ADJ
extremely painful or bad 極痛苦的；極壞的；糟糕透頂的
仿 This is a very excruciating experience.
原Even though my legs were working now, the thirteen miles from the thirty-four-mile rest stop to the forty-seventh mile were excruciating.
4.grit your teeth
to bite your teeth tightly together 咬緊牙關
to be determined to continue to do sth in a difficult or unpleasant situation 下定決心；鼓起勇氣
仿 He gritted his teeth against the pain.
原Ultimately, using every trick in the book, I managed to grit my teeth and make it through thirteen miles of sheer torment.
5.fallout NOUN
dangerous radioactivedust that is in the air after a nuclear explosion （核爆炸後的）放射性墜塵
the bad results of a situation or an action 後果；餘波
仿We can't afford that kind of fallout.
原Still, the most significant fallout from running the ultramarathon wasn’t physical but mental.
6.Sentences
If I sat down, I felt, I’d never be able to get up and start running again.
如果我坐下了，那么我可能再也无法继续这段马拉松了。
I still had lots of stamina, and my breathing was regular, but my legs had a mind of their own. I had plenty of desire to run, but my legs had their own opinion about this.
很有意思的描述，心有余而力不足。
My body felt like it was falling apart and would soon come completely undone.
描述身体累到快散架了。
I’m not a human. I’m a piece of machinery. I don’t need to feel a thing. Just forge on ahead.
这个其实与练功是一样的，不停的告诉自己这个身体不是自己的，拉开就好了。练完就好了。
No matter how slow I might run, I wasn’t about to walk. That was the rule.Break one of my rules once, and I’m bound to break many more.
这是支撑自己的力量。代表了作者的咬牙坚持。给自己定的规则绝对不能打破，否则这个规则也会很快瓦解崩溃。
Nobody pounded the table anymore, nobody threw their cups.
这个比喻很有意思。
7.Summary
In today's reading, the author shared his experience in the ultramarathon. I think we can try to do some thing that are challenging for us . Life is very short, we will not regret it later if we do what we want to do .
