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- 问题详情：Afieldtripisajourneybyagroupofpeopletoaplaceawayfrom61(they)normalenvironment.Thepurposeofthetripisusuallyobservationfor62(educate),non-experimentalresearchortoprovidestudentswithexperiencesoutsidetheireveryday63(activity),suchasgoing64(camp)...
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