average lifespan 예문

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1. The average lifespan was 47 years when the 20th century began.
2. The okapi's average lifespan is 20 to 30 years.
3. In captivity, they have an average lifespan of 11 years.
4. The breed has an average lifespan of 10 to 17 years.
5. Average lifespan for wild birds is not reported in the literature.