求翻译：改革开放以来，广东省作为中国经济发展的前沿地带，经济获得了飞速的发展。但伴随而来的是产业低端化、环境污染严重、劳动力成本增大等问题制约着广东省经济的进一步发展。而近年来美国次贷危机引发的全球金融危机使得广东省产业结构问题愈加凸显。因此，从国内外经济形势来看，广东省的产业升级已经刻不容缓。是什么意思？

Since the reform and opening up, Guangdong Province, as the frontier of China's economic development, economy has developed rapidly. Accompanied by the low end of industry, and serious environmental pollution, increased labor costs, restricting further economic development of Guangdong Province. In