hypothermia
noun [ U ] uk/ˌhaɪ.pəˈθɜː.mi.ə/ us/ˌhaɪ.poʊˈθɝː.mi.ə/
（因持续寒冷而）体温过低
a serious medical condition in which a person's body temperature falls below the usual level as a result of being in severe cold for a long time
In this current cold spell, many old people are dying needlessly of hypothermia. 在现在这段寒流期间，很多老人都因为体温过低而无端丧生。