第五部分（第四章）：分析预测长底乡布依语母语发展趋势，介绍国内濒危语言保护情况，并据此提出有针对性的保护和抢救措施。
The fifth part ( the fourth chapter ) analyzes and forecasts of the development of Buyi , introducing the protection of endangered languages in China , and then puts forward the targeted protection and rescue measures .
长底乡