[00:00.24]We spend about one-third of our lives asleep.#
一生之中，我们用三分之一的时间来睡觉。#
[00:05.90]This may sound like a lot of time, but it is not wasted.#
虽然听起来时间很长，但这些时间绝对没有浪费。#
[00:12.85]Our bodies need sleep to stay healthy.#
人体需要睡眠来保持健康。#
[00:17.22]Not getting enough sleep, or as we sometimes say shut-eye, can make us sick.#
没有充足的睡眠，会使我们生病。#
[00:24.87]The immune system protects the body from diseases and infections.#
免疫系统可以帮助人体抵御疾病和感染。#
[00:31.98]Not getting enough sleep hurts this protective system.#
而缺乏充足的睡眠会伤害免疫系统。#
[00:37.18]The Mayo Clinic is a nonprofit research hospital in the United States.#
梅奥诊所是美国一家非盈利性研究医院。#
[00:44.36]Its website explains that when we sleep our bodies release proteins that support sleep and help us fight infections.#
其官网上指出，入睡后人体会释放出蛋白质从而保证睡眠并对抗感染。#
[00:56.59]They add that infection-fighting antibodies and cells are reduced during periods when you don’t get enough sleep.#
他们还指出，当睡眠不足时，对抗感染的抗体和细胞也会减少。#
[01:06.99]A new study from the University of Washington in the US seems to confirm this.#
美国华盛顿大学一项新研究似乎证实了这一观点。#
[01:15.84]Dr.Nathaniel Watson was the lead writer of the study. #
纳撒尼尔·沃森（Nathaniel Watson）博士是该研究的首席作者。#
[01:21.88]He is also co-director of the university’s Medicine Sleep Center at Harborview Medical Center.#
他还是华盛顿大学港景医学中心睡眠医学中心的联席主任。#
[01:30.88]Watson says his study shows that the immune system works best when the body gets enough sleep.#
沃森成，他的研究显示，只有当人体获得充足睡眠时，免疫系统才能发挥最大功效。#
[01:41.08]For the study, Watson and his team studied 11 pairs of identical twins.#
为了进行研究，沃森和团队分析了11对同卵双胞胎，这与其它的睡眠研究之间有重大区别。#
[01:50.12]This is an important difference from other sleep studies. Other research did not study identical twins.#
其它研究未曾分析过同卵双胞胎。#
[02:00.02]The identical twins, however, had different sleep patterns.#
同卵双胞胎的睡眠模式并不相同。#
[02:06.16]Researchers found that the twin who slept less had a weaker immune system.#
研究人员发现，双胞胎中睡眠较少的人免疫力更脆弱。#
[02:12.97]Watson says his study showed for the first time that a long-term lack of sleep shuts down parts of the immune system.#
沃森表示，其研究首次证明，长期缺乏睡眠会导致免疫系统的部分功能停止运作。#
[02:24.36]He says parts that move white blood cells around the body are affected.#
负责输送白细胞的功能会受到影响。#
[02:31.07]White blood cells fight infection in the body.#
白细胞可以对抗体内感染。
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