protected zone短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 防护带,保护区,防护区 The execution of Yangtze valley flood control plan will remarkably upgrade the flood control standard of flood protected zone, and produce remarkable economic, environmental and social benefits. 长江流域防洪规划的实施，将显著提高防洪保护区的防洪标准，其经济效益、环境效益、社会效益十分显著。 chemyq