unrecognized [ʌnˈrekəgnaɪzd]

例句:

• There is the possibility that hypothermia can go unrecognized.
  人们有可能察觉不到体温的过低。
  
• The problem of ageism in the workplace often goes unrecognized .
  工作场所的年龄歧视问题常被忽视。
  
• I was there too, observing , unrecognized, a stranger among the people.
  我也夹在人群中观望着, 没有人认出我来,我只是一个陌生人而已.