以上内容由AI生成, 仅供参考和借鉴

life,生命，span,扩展。

1. A 15-year lifespan is not uncommon for a dog.

15年的寿命对狗而言是比较常见的。

2. Most boilers have a lifespan of 15 to 20 years.

绝大多数锅炉有15至20年的使用期限。

3. Worms have a lifespan of a few months.

蠕虫的寿命为几个月。

4. They postulated a 500-year lifespan for a plastic container.

他们假定塑料容器的寿命为500年。

5. Once the ovum is released it has a lifespan of 12 to 36 hours.

卵子排出后可存活12至36小时。