任璧莲的《典型的美国人》反映了文化身份的流动性。

Typical American by Gish Jen reflects the fluidity of identity.

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还有空间，不仅仅是地理意义上的空间，更是指机会，指社会身份的流动性。

And there is space not only in a geographical sense, but in the sense of opportunity, of social mobility.

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