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汉语拼音：píng jūn shòu mìng

指放射性物质全部原子蜕变所需时间的平均值，它为半衰期的1.443倍。

平均寿命 [　　原子或原子核体系在某一态的平均寿命。在指数衰变体系为在某一态时的原子或原子核数目减少@@@@@／e倍的平均时间。#####]

1. 　　原子或原子核体系在某一态的平均寿命。在指数衰变体系为在某一态时的原子或原子核数目减少@@@@@／e倍的平均时间。

• We would report that the mean life of the company's batteries is 36 months.

  我们可以向经理报告,该公司所产电瓶平均寿命是36个月.

• And hence the mean lifetimes of the two brands of engines, are equal.

  也就是说,两种牌号引擎的平均寿命是相等的.

• The average life span of a major league baseball is 5 - 7 pitches.

  大联盟用的棒球平均寿命只能被投五到七次?

• Captain tell you the life expectancy for pilots around here?

  上校告诉你们飞行员的平均寿命有多长 吗 ?

• With the average lifespan, marriage and childbearing ages all continuing to rise.

  鉴于平均寿命 、 适婚年龄、和生育年龄持续上升.

• Eagle is the world's longest life expectancy of birds.

  鹰是世界上鸟类中平均寿命最长的.

• The average lifespan of the worm is 21 days.

  该蠕虫的平均寿命为21天.

• Even so , the life expectancy rate has increased since last year.

  不过, 国人平均寿命比前一年成长了.

• Black life expectancy has soared from 34 in 1900 to 73 today.

  黑人平均寿命从1900年34岁跃升到现在73岁.

• The average age of the 70 people is 57.74.

  70人的平均寿命为57.74岁.

• The average span is only seventy odd years worldwide.

  地球人类目前平均寿命只有七十几岁.

• Scandinavia's citizens also live long lives, with average life expectancy of 79.

  斯堪的纳维亚地区的居民寿命也更长, 平均寿命为79岁.

• The average dollar bill has a life span of about 18 - 22 months.

  美元纸币的平均寿命是大约 18-22 个月.

• Today the average life expectancy is 56.

  今天的平均寿命是56年.

• Life expectancy is now 75.5 years.

  现在的平均寿命已达到75.5岁.