19世纪的美国曾掀起“淘金热”,那个时候,有一个年轻人来到了美国西部重镇洛杉矶,他也决定试试淘金的运气。在一个天寒地冻的日子里,他的同伴认为找到金矿已指日可待了。但这个年轻人却已筋疲力尽,连再提一桶水来冲刷泥土的力气都没有了。他说,即使知 In the 19th century, the United States had set off a “gold rush.” At that time, a young man came to Los Angeles, the western city of the United States. He also decided to try gold luck. In a cold day, his companions thought that finding a gold mine was just around the corner. But this young man was exhausted, and he did not even mention the strength of a bucket of water to flush the soil. He said even if you know