two-up two-down

noun
🔊/tuː ˌʌp tuː ˈdaʊn/
🔊/tuː ˌʌp tuː ˈdaʊn/
(British English, informal)
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  1. a house with two rooms on the bottom floor and two bedrooms upstairs两上两下的房屋(楼下两室,楼上两卧室)Topics Houses and homesc2