青云翻译

8 adequate sleep, U.S. researchers conducted a trial, allow volunteers to sleep late at night, next day, their immunity down 30%. Then, letting them get enough sleep 8 hours, and found that their immune system fully restored.

　　8. sleep sufficient United States researchers conducted an experiment, volunteers slept only after midnight and the next day, their immune systems fell 30%. Then, let them sleep for 8 hours, found that their immunity is restored.

　　8. sleep sufficient US researchers once have carried on an experiment, lets the volunteer only rest late at night, second days, their immunity dropped 30%.Then, also lets them rest the foot for 8 hours, finally discovered, their immunity restored completely.

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　　8. sleep sufficient United States researchers conducted an experiment, volunteers slept only after midnight and the next day, their immune systems fell 30%. Then, let them sleep for 8 hours, found that their immunity is restored.