Which of these insects has the shortest life span?

哪种昆虫寿命最短？

" Thankfully, the creatures we raise have a five-year life span, " Mr. Knapp said.

“庆幸的是，我们养的这东西能活5年，”纳普说。

Dragonflies and swallows and nighthawks seine the air where the minute winged creatures flit out their minute life spans.

蜻蜓、燕子和夜鹰在天空中像围网似地捕食，而极小的有翼动物在空中轻快地飞来飞去，顷刻间其想暂的生命便结束了。

That is less than half of the life span that its employees can expect to enjoy.

这几乎是它的员工工作寿命的一半。

So genes matter less than what we thought before to life span.

所以基因对寿命的重要性比我们之前想象的少。

Some economists argue that increased life spans are, in a very basic sense, good for the economy.

一些经济学家认为，从非常基本的意义上说，延长寿命对经济有利。

And tires at the nose of the plane tend to have shorter life spans than the rest.

飞机机头的轮胎通常比其他轮胎的寿命更短。

For example, we can ask to what extent genetic variations account for differences in life span between individuals.

比如，我们可以问遗传变异能在多大程度上影响个体的寿命差异。

Globally, the average life span is 71.4 years; for a few lucky people, it may exceed 100 years.

全世界人口的平均寿命是71.4岁，少部分幸运的人呢能够活到100多岁。

Life spans seven orders of magnitude, from invisible bacteria to mites, ants, mice, dogs, humans, elephants and, blue whales.

生命的尺寸横跨七个等级， 从看不见的细菌到尘螨、蚂蚁、老鼠、狗、人类、大象、蓝鲸。