Most conjoined twins have a very short life-span.

婴儿大多数都寿命很短。

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I am still young, but I see life can be so very short, it sometimes is much the same as taking a sleep.

你看我今年岁数小，但是我总结了，人这一生其实可短暂了，有时候一想，跟睡觉是一样一样的。 眼睛一闭，一睁，一天过去了；眼睛一闭，不睁，这辈子就过去了。

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“The more we seek satisfactions in material goods, the less we find them there,” Ryan says. “The satisfaction has a short half-life -- it’s very fleeting.”

“越想在物质生活上寻找满足感，越难找到，”瑞安说：“这种满足感半衰期很短，很容易消失。”

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This means that the new government is likely to have a very short life.

BBC: Bumpy ride ahead for Italy after indecisive election

It has a very short half-life, which in practical terms means that it goes in and out of the body very quickly.

CNN: What are the long-term brain effects of Xanax?

She faced both affection and loathing during her few short years in the public eye, before her life was tragically cut short at a very young age.

BBC: Obituary: Jade Goody