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AAmericanscientistssaytheybelievetreescan (1 )warneachothertodangerbysendingoutchemi cals (2 )intotheair.ThetheoryannouncedwiththeNa tional (3)ScienceFoundationistheresultforstudiescar ried (4 )onbyscientistsinthestatesofWashingtonandNewHampshire . (5 )Thescientist… 相似文献
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