Greycation is a family vacation which is spent with grandparents in an effort to share costs.
同堂假期是和祖父母一起度假来分担费用的家庭假期。

An estimated 2.7 million families are planning to holiday in the UK this year with children, parents and grandparents all in the same resort, according to a survey. Researchers say that total has soared this year thanks to the rising price of foreign holidays and the opportunities for sharing costs on a greycation.
据调查，英国今年预计有270万个家庭计划和孩子、父母及祖父母在同一地方度假。调查者称，选择同堂度假的人数增多，一方面是因为境外游的价格上涨，另一方面是因为可以分担开支。

In addition to the economic benefits of multi-generational vacationing, many of those surveyed said greycations were appealing because they allowed grandparents and grandchildren to spend more time together.
此外，许多受访者称，同堂假期这么有吸引力，除了经济利益方面的原因，还因为这种假期让祖父母和孙子孙女有更多的时间共处。