Our perception of cold may depend mostly on changes in skin temperature, which starts dropping first when we step outside. People feel cold well before their core temperatures dip, says Tikuisis.
Tikuisis说，我们对冷的感觉可能大多靠皮肤温度变化而感知，我们到户外就能
2
Global economic issues are among the core elements of post-Cold War international relations and like other countries we give priority attention to these issues.
全球经济问题在冷战后的国际关系处于中心位置，我们同其他国家一样对这 些问题给予优先考虑。
3
When it's cold, blood flow is concentrated on your body's core, leaving your hands and feet vulnerable to frostbite.