近年来,长江上游的水土流失问题十分严重。 近年來,長江上游的水土流失問題十分嚴重。 jìn nián lái,cháng jiāng shàng yóu de shuí tǔ liú shī wèn tí shí fēn yán zhòng . phr. During recent years, the soil erosion problem in the upper reaches of the Yangtze River has gotten quite serious. |