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1·The batteries had a life span of six hours.

电池的使用寿命是6小时。《柯林斯英汉双解大词典》

2·Our life span is restricted.

我们的寿命是有限的。

3·Every organism has a life span which is highly characteristic.

每个生物体的生命周期都极其独特。

4·Most of the improvements in life span are the result of preventive, rather than treatment.

大多数寿命的延长是预防的结果，而不是治疗的结果。

5·Thus they are not able to experience life and so they attain a high life span in captivity.

因此，他们不能“体验生活”，从而在囚禁中获得了较长的寿命。

6·Nevertheless, a restricted life span, ageing, and then death are basic characteristics of life.

然而，有限的寿命、衰老和死亡是生命的基本特征。

7·Experience will show that to live in this way not only increases the life span but is also very healthy.

经验会表明这样的生活方式不仅能延长寿命，而且是非常健康的。

8·Long-living women are also more likely to be sympathetic and cooperative than women with a normal life span.

与寿命处于正常范围内的女性相比，长寿女性更有可能具有同情心和合作精神。

9·The results add to a growing body of evidence that certain psychological factors may predict a longer life span.

有越来越多的证据表明，某些心理因素或许能预示更长的寿命，这些结果进一步证实了这一点。

10·In comparison to the life span this relationship is inverted: the larger the organism the lower its metabolic rate.

与寿命相比，这种关系是“反向的”：生物体越大，其代谢率越低。