1.bound
ADJ
bound to do
be sth certain or likely to happen, or to do or be sth 一定會；很可能會
forced to do sth by law, duty or a particular situation 受（法律、義務或情況）約束（必須做某事）；有義務（做某事）
prevented from going somewhere or from working normally by the conditions mentioned 因…受阻（或不能正常工作）
travelling, or ready to travel, in a particular direction or to a particular place 正旅行去（某地）；準備前往（某地）
仿We're bound to do the work.
原Being surrounded by other runners is bound to have an influence on you.
2.ponder VERB
to think about sth carefully for a period of time 沉思；考慮；琢磨
仿He sat pondering over his problem.
原As I was pondering this, I started to feel a little remorseful.
3.drop out
If someone drops out of college or a race, for example, they leave it without finishing what they started.退学;退出(比赛等)
仿 She drop out of the game because of her illness.
原As I said before, I’ve been fortunate as a runner not to have had any major injuries. And I’ve never had to cancel a race or drop out because of illness.
4.snowflake NOUN
a small soft piece of frozen water that falls from the sky as snow 雪花；雪片
很好的例句
They have as much chance as a snowflake in hell.他们毫无希望。
原Out the window of my campus office I watched the wet snowflakes falling.
5.crisp ADJ
(of food 食物 ) pleasantly hard and dry 脆的；酥脆的
(of fruit and vegetables水果和蔬菜) firm and fresh 鮮脆的；脆的
(of paper or cloth 紙張或布料 ) fresh and clean; new and slightly stiff without any folds in it 潔淨的；挺括的
(of the air or the weather 空氣或天氣 ) pleasantly dry and cold 涼爽的；清新的；乾燥寒冷讓人舒暢的
仿 His answer was crisp.
原The air is clear and crisp, and the leaves on the trees in Central Park are just beginning to turn golden.
6.Sentences
Reaching the finish line, never walking, and enjoying the race. These three, in this order, are my goals.
这三点看似简单，但是路程过了一半恐怕我们的享受与坚持跑步就所剩无几了。而且作者是在膝盖生病的情况下做到的这三点，真的很令人佩服。
You’ve done everything you needed to do, and there’s no sense in rehashing it. All you can do now is wait for the race.
尽人事，听天命。心态要好，遇事不慌。
7.Summary
In today's reading, the author shared his life with us and expressed his optimism and positives.I also admire the author's perseverance. It was clear that his right knee was injured, but the author did not stop running . In later life, I want to learn to be optimistic and I will to exercise to strengthen my willpower.