While many are still on a high after being reunited with family members and friends,this sense of euphoria will decline
问题描述：
While many are still on a high after being reunited with family members and friends,this sense of euphoria will decline as post-holiday syndrome kicks in.
post-holiday是什么意思呢?
kicks in在这里又是什么意思呢?
答
post-holiday意思是节后之后,节日过后
kicks in意思是发生、产生（某种情绪）、（药物等）开始起作用
整句意思是：尽管一些人在与家人朋友团聚后仍很兴奋,但这种欢欣的感觉会在假日后综合症出现后减弱.