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21 至 25
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A crop circle is aphenomenon 21 crop plants with upright Stalks, Such as wheat,
barley, corn, and so on, are flattened or bent over, producing circular and other ComDlex
gecometric patterns when viewed from the air Crop _circles were firStL reported in large
numberS during the last decades of the twentieth century in farm fields in rural England, but
they have Since becomea worldwide occurrence .
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VariouS 2 ave been 和 才 eXplain their formation, rangeing from natural
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CausSe$S to _hoaxeS to the + Mt 亨本 GIODSGIUGle 2 UHGQSs and
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eXtraterreStrlal belngS, with some claiming that they are communications from aliens. While
時作訊!
many have been proven to be practical Jokes, crop circles continue to appear regularly, and
both the genera] public and scientists fascinated by them. 24 similar mySterious
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。 phenomena, there are those who believe crop clircles originate in arealm _25 _the known
physica World, and there are those who reject Such 2
NOW 2 onwnh _“(D),where