单语范例（未经PONS编辑处理）
英语
- Although about 63% of the individuals carry at least one of these lethal alleles, almost none carry two copies of the same lethal.en.wikipedia.org
- As inbreeding increases, the probability of being homozygous for one (or more) of these lethal alleles also increases, causing fitness to decline.en.wikipedia.org
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英语
- let
- let by
- let down
- let-down
- lethal
- lethal allele
- lethal factor
- lethality
- lethally
- lethargic
- lethargically