natural mortality rate

常见例句

双语例句

• Conclusion In order to reduce mortality rate of the residents in the area, it is necessary to strengthen the administration of natural and social environment of the area.
  结论 为了降低该区居民死亡率，既要进一步加强其自然环境的治理，也应重视社会环境的治理。
  d.wanfangdata.com.cn

权威例句

• Whale researchers use population models that factor a species' reproductive rate and its natural mortality to come up with an estimate of how many are likely dying.
  MSN: Feds to reroute SF Bay ships to protect whales
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