pied-a-terre
n
(pl pieds-a-terre ) (French 法) small flat or other accommodation that one keeps for use when necessary (私人备用的)小公寓, 住所
They own a cottage in Scotland and a house in London as well as a pied-a-terre in Paris. 他们在苏格兰有一村舍, 在伦敦有一所房子, 在巴黎还有一套备用公寓.