"When people are sleep-deprived, there are higher levels of stress hormones in their bodies which can decrease immune function," says Doctor Felice, of Northwestern University in Chicago.
2016年6月四级真题(第一套)听力 Section C
柯林斯高阶英汉双解学习词典释义
ADJ
西北部的;来自西北部的
North-western means in or from the north-west of a region or country.