This level is also a safety limit to avoid health harm of environmental noise.
最高允许值也是为避免环境噪声对人的健康危害而定的一个安全界限。
Meanwhile measuring the limit value and the best value of tourism environmental capacity;
②同时对旅游环境容量的极限值和最佳值（最适值）进行测算；
Meanwhile measuring the limit value and the best value of tourism environmental capacity;
②同时对旅游环境容量的极限值和最佳值（最适值）进行测算；
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