原来的居民可能会认不出这个崭新的城镇了。The new town would have been unrecognisable to the original inhabitants.他觉得她在雪天里认不出他的车子。He did not think she could recognize his car in the snow.她如此乔装改扮，连她妈妈都认不出她了。She's adopted so many disguises...

“认不出”的英语可以翻译为：misknow ...