Saving lives

    At a pre-med (医学院预科）university in St. Louis, we had to take a difficult class in physics. One day the professor was discussing a particularly complicated concept. A student rudely interrupted to ask "Why do we have to learn this stuff?""To save lives." The professor responded quickly and continued the lecture. A few minutes later, the same student spoke¹ up again. "So how does physics save lives?" he persisted. "It usually keeps the idiots like you out of medical school," replied the professor

1 spoke   

n.（车轮的）辐条；轮辐；破坏某人的计划；阻挠某人的行动 v.讲，谈（speak的过去式）；说；演说；从某种观点来说

参考例句：

• They sourced the spoke nuts from our company.他们的轮辐螺帽是从我们公司获得的。
• The spokes of a wheel are the bars that connect the outer ring to the centre.辐条是轮子上连接外圈与中心的条棒。