有这么一个故事：有一个参加长跑的选手在走过一片沙滩时，鞋子里灌满了 沙

There is such a story: When a long-distance runner walked across a beach, his shoes were filled with sand. He hurriedly took off his shoes, poured out the sand randomly, and hurriedly continued to run. But there was still sand left in his shoes, and on his next journey, the sand rubbed his feet, causing him to take a step and a step to hurt. But he didn't stop to take off his shoes and shake out the sand that was grinding his feet, but still hurried forward, not far from the finish line, because of unbearable foot pain, he had to stop and finally gave up the race. When he took off his shoes in a heart-wrenching pain, he found that it was only a grain of sand that made him suffer for hours and give up the game.

There is a story: a long-distance runner was walking through a beach when his shoes were filled with sand. He took off his shoes in a hurry, poured out the sand indiscriminately, and then hurried on. But there was still sand in his shoes. In his later journey, the sand rubbed his feet and made him walk and hurt. But he didn't stop to take off his shoes and shake out the sand grinding his feet. Instead, he hurried forward. Not far from the finish line, he had to stop because of unbearable foot pain and finally gave up the game. When he took off his shoes with heart wrenching pain, he found that it was only a grain of sand that made him miserable for hours and gave up the game.

There is a story about a runner who was walking across a beach, and his shoes were filled with sand. He took off his shoes in a hurry, poured out the sand at random, and then hurried on. But there is still sand left in his shoes. In his later journey, the sand grinds his feet, making him step by step and hurt him step by step. But he didn't stop to take off his shoes and shake out the sand that grinds his feet. Instead, he hurried forward. Not far from the finish line, he had to stop because his feet were so painful that he finally gave up the game. When he took off his shoes with heart-wrenching pain, he found that it was only a grain of sand that made him suffer for several hours and gave up the game.