The place wasn’t entirely authentic, though. Unlike a normal Parisian apartment, the plumbing (水管) worked. There was a nice kitchen and a comfortable bed. Our building even had a tiny lift with a female voice that said, “Ouverture des portes,” in perfect French. That is the only French phrase I mastered, and it’s a shame I don’t have much use for it. (2021新全国卷I阅七)

这是2021年新高考英语全国卷I（全国乙卷）的阅读理解七选五中的一段。其中的Ouverture des portes 是法语。请问这个 Ouverture des portes 是什么意思呀！麻烦懂法语的老师翻译一下，谢谢！