The walk is really little more than a cultural touchstone and a literary conceit, the event around which McCann has assembled his cast.

在云端中行走——麦凯恩将他的角色交汇的事件，真的稍甚于文化精粹和文学奇喻。

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Since then, the park has become a cultural touchstone to its many fans and a target for its detractors.

NPR: Disneyland Celebrates 50th Anniversary

As we figure out the answer, prom becomes an even more important cultural touchstone for who we want our girls to become.

CNN: The damaging messages of proms

Pretty soon, one school cuts its program, and another, and then leagues have to consolidate and football becomes less of a cultural touchstone.

FORBES: Why Student Apathy, Not Concussions, Could Doom High School Football