1、两人世界 指的是 不要孩子翻译为remain childless 参考：This is an indication that some young couples may opt to remain childless as they are worried about problems such as financial strain, nurturing and education. 这也说明了有些年轻夫妇担心经济吃紧，也忧虑照顾以及教育孩子的问题而选择过两人世界。

2、a world between you and mefamily homethe space of couple或者Two of the worldthe world of two personstwo posson in the worlda world of two。