اهميت خواب در سلامتی بشر A new study in Britain has shown how important sleep is to a person's health. According to the study, those people who sleepless than seven hours a night are more likely to die of heart disease. Almost a third of the British population is sleeping five hours a night or less. Health : well-being سلامت Disease : sickness ناخوشي، مرض Population : people جمعيت و مردم
