If something is unrecognized, people are not aware of it.
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。There must be many vases, bowls or bottles sitting unrecognised in people's homes...人们的家里一定有很多不起眼的花瓶、碗或瓶子。
ADJ
不被承认的；不被认可的
If you or your achievements or qualities are unrecognized, you have not been properly appreciated or acknowledged by other people for what you have done.
例句
Hard work and talent so often go unrecognised and unrewarded...努力和天赋经常不被认可，也得不到回报。She became ill and died with her life's work unrecognised...她病逝了，而她一生的工作却没有得到认可。
ADJ
非正式的；非官方的
An unrecognized meeting, agreement, or political party is not formally acknowledged as legal or valid by the authorities.