单语范例（未经PONS编辑处理）
英语
- A scientific study attributed the population crash to the limited food supply in interaction with climatic factors (the winter of 196364 was exceptionally severe in the region).en.wikipedia.org
- A second use is in combating important crop pests, again by introducing gene-driven genetic elements that lead to a population crash.www.independent.co.uk
- In 2003 there was a final population crash in the species.en.wikipedia.org
- After exhausting available organic material within a local area, grey goo would experience a population crash in that area, slowing or ending its outward spread.en.wikipedia.org
- Some think the same dynamics that created this year's large catch will lead to a population crash next season.www.slate.com
- When these sterile males mate with females, no offspring are produced, resulting in a population crash.gizmodo.com
- Over the years, a population crash occurs.en.wikipedia.org
- Possible alterations include adding, disrupting, or modifying genes, including some that reduce reproductive capacity and may cause a population crash.en.wikipedia.org
- The populations are especially vulnerable during the years when the prey population crashes, and uncontrolled trapping has almost eradicated two subpopulations.en.wikipedia.org
- Allegedly such population crash led to a corresponding reduction in genetic, phenotypic and phonemic diversity.en.wikipedia.org
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