Translate the phrases.
play a trick on
dress up as
But behind all these things lies the true meaning of Christmas: the importance of sharing and giving love and joy to people around us.
这是一个倒装句。主语是the true meaning of Christmas: the importance of sharing and giving love and joy to people around us，谓语是lies。介词短语behind all these things置于句首引起句子倒装，是为了保持句子平衡，避免头重脚轻。
lie behind 背后存在; 是 … 的原因
I wonder what lies behind his decision to leave.
Two things lie behind Latin America\’s renaissance.