A piece of music named Erquan Yingyue (Moon Reflected on Second Spring) deeply moved me.

一首叫《二泉映月》的曲子深深地打动了我。

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Autumn is a second spring when every leaf is a flower.

秋天即是第二个春天，每片叶子都是花朵。

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Autumn is a second spring when every leaf is a flower. (Albert Camus)

秋天是春天的延续，每一片树叶都是一朵鲜花。

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For example, how do I know that when I pull the spring the first time for the mass, it exerted the same force when I pulled the spring the second time for the elephant?

例如 怎样才能知道,第一次连着物体拉弹簧时,产生的力和,第二次连着大象拉弹簧时产生的力是相等的呢

耶鲁公开课 - 基础物理课程节选

We did the comparison with the elephant or something; a is the second derivative of x and for this problem, when F is due to a spring, we know the force is that by studying the spring.

我们也已经把它与大象或其它东西作过比较,a 是 x 的二阶导数,在这个问题中,F 是由弹簧产生的,我们在讨论弹簧问题时已经知道了力的大小

耶鲁公开课 - 基础物理课程节选

Harrell was efficient in his second spring start, giving up three singles and getting two double plays.

WSJ: Ankiel leads Astros over Yankees' split squad 7-6

Pettitte allowed four runs, eight hits and one walk in his second spring training outing against a big league opponent.

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Rivera, who had surgery last June 12 to repair a torn anterior cruciate ligament in his right knee, went through his second spring training bullpen session and then watched the others throw.

WSJ: Sabathia throws off the mound