有这么一个故事:有一个参加长跑比赛的选手在经过一片沙滩时,鞋子里灌满了沙子,他匆匆把鞋子脱下,胡乱地把沙子倒出,便又急忙地继续往前跑。可是有一粒沙子仍留在他的鞋里,在他以后的路程中,那粒沙子磨着他的脚,使他走一步,痛一步。但他并没有停下把鞋子脱掉,抖出那粒磨自己脚的沙子,而仍是匆匆前行,在离终点不远的地方,因脚痛难忍,他不得不止步,最后放弃了比赛。当他忍着揪心的痛把鞋脱掉时,他发现让自己痛苦并放弃比赛 There is such a story: When a player who participated in a long-distance race passed through a beach, his shoes were filled with sand. He hurriedly took off his shoes, poured out the sand indiscriminately, and rushed forward again. But a grain of sand remained in his shoes. In his later journey, the grain of sand rubbed his feet, causing him to take a step and a painful step. But he did not stop to take off his shoes and shook out the sand that grinds his feet, but he still rushed forward. In a place not far from the end, he had to stop because of his foot pain, and finally gave up. game. When he took off his shoes with enduring pain, he found himself suffering and abandoned the game.