出典:Wiktionary
night air (countable かつ uncountable, 複数形 night airs)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/01 13:24 UTC 版)
Prior to the late 19th century, night air was considered dangerous in most western cultures. Based on “zymotic” theory, people believed vapors called “miasma” (plural "miasmata") rose from the soil and spread diseases. Miasmata came from rotting vegetation and foul water—especially in swamps and urban ghettos.