科学家们在通过对一种野生绵羊的研究后,宣布他们已经发现了人体季节生物钟现象的原因。研究者们说他们的这项已在《现代生物学》杂志上发表的研究课题,对弄清楚有些人为什么会在冬天的几个月里体重增加并且感觉沮丧有着重要的意义。他们发现某些基因相互作用的方式导致了脑部个体细胞的变化,而这相互作用的方式又受白昼的长短所影响。人类和动物体内的生物钟影响着精神状态,胃口以及体能水平。当漫长的冬夜来到时,许多人发现他们的情绪也变了。 After researching a wild sheep, the scientists announced that they had discovered the cause of the body’s seasonal biological clock phenomenon. Researchers say that their research project, published in the journal Modern Biology, has important implications for figuring out why some people will gain weight and feel depressed in the winter months. They found that the way some genes interacted led to changes in the brain’s individual cells, and the way this interaction was affected by the length of the day. The biological clocks in humans and animals influence the mental state, appetite and physical fitness. When the long winter night comes, many people find that their emotions have also changed.