该句用原因状语结构说明失败原因。
One day, he asked his uncle, who often tutored him in mathematics: "If I were to run alongside light at the speed of light in a vacuum, would I be able to see the electromagnetic waves vibrating in space?" His uncle gazed at him for a long time, his eyes reflecting both admiration and concern. He knew that the question Einstein posed was extraordinary and would cause an unexpected tremor in the scientific world. This question haunted Einstein ever since. In the autumn of 1895, after careful consideration, Einstein decided to apply to the University of Zurich. However, he failed due to insufficient language skills. Undeterated, he enrolled in secondary school preparatory courses and, a year later, obtained his certificate and was admitted to ETH Zurich. At that time, he was fully dedicated to extracurricular reading and laboratory work, which drew disapproval from professors who thought he was "neglecting his studies."
At the time of his graduation, the economic crisis was unfolding. Due to his Jewish heritage and a lack of connections and funds, Einstein found himself unemployed. To make a living, he had to post advertisements to teach physics for a small fee. This period of unemployment proved to be of great help to Einstein. During his teaching, he reflected on classical physics, leading to a powerful challenge to traditional academic views. After five weeks of intense effort, Einstein wrote the 9,000-word paper "On the Electrodynamics of Moving Bodies," marking the birth of Special Relativity. This was a decisive and magnificent manifesto in the history of physics and another milestone in the advancement of the field.
一天，他曾问辅导他数学的舅舅：“如果我用光在真空中的速度和光一道向前跑，能不能看到空间里振动着的电磁波呢?”舅舅盯着他看了许久，眼神中既有赞许，也带着一丝担忧。因为他深知，爱因斯坦提出的这个问题意义非凡，将引发一场科学界的巨震。此后，这个问题一直萦绕在爱因斯坦的心头。1895年秋天，经过深思熟虑，爱因斯坦决定报考苏黎世大学，却因外语成绩不及格而落榜。但他并未气馁，通过参加中学补习，一年后成功获得了证书，并考入了苏黎世联邦理工学院。当时的他正全身心地投入到课外阅读和实验室工作中，这让教授们感到不满，认为他“不务正业”。
大学毕业时，正值经济危机，由于爱因斯坦是犹太裔且缺乏人脉与资金，陷入了失业困境。为了维持生计，他不得不通过张贴广告、授课来换取微薄的报酬。这段失业时光反而成就了他，在授课过程中，他对传统物理学进行了深刻反思，促成了对传统学术观点的冲击。经过五周的高强度钻研，爱因斯坦写下了长达9000字的论文《论动体的电动力学》，狭义相对论由此诞生。这不仅是物理学史上一次伟大的宣言，更是物理学迈向新纪元的里程碑。
"Setbacks are merely the tuition fees on the road to success."
"After experiencing failure, I found it difficult to withstand the crushing blow"
"Setbacks are both the threshold and the stepping stone to success."
"Those who have never experienced setbacks often crumble in the face of failure;"
"However, her excitement was quickly replaced by a sense of defeat."