导读:同学们,你们可曾听说过胡杨林?在那戈壁沙漠,它像横空出世的巨龙,潜卧谷底;它像巨浪汹涌的黄河,一泻千里;它像蜿蜒逶迤的长城,穿越关山。曾经,他们生长着,繁茂着,覆盖边疆。如今那里站着、躺着的是干枯的树干,有的被刀斧劈过,有的被雷电击过,有的被野火烧过……它们为何衰败了呢?让我们一起倾听,一起思索…… It is like a huge dragon born in the sky, lying on the bottom of a river. It resembles the surging Yellow River and runs high for thousands of miles. It looks like a winding Great Wall passing through Guan Shan. Once upon a time, they grew, lush, and covered the frontier. Now there stood, lying dry trunk, and some had been chopped by a sword ax, some were struck by thunder and lightning, and some were wildfire burned ... ... why they decline? Let us listen together, thinking together ... ...