the melting pot用英语解释（一两句话）

The melting pot is a metaphor for a heterogeneous society becoming more homogeneous,the different elements "melting together" into a harmonious whole with a common culture.It is particularly used to describe the assimilation of immigrants to the United States; the melting-together metaphor was in use by the 1780s.
不知道你说的是不是这个...