- 问题详情:Ifyougoouttothefieldsatnightspringorsummer,youcanhearsinging 61 (happy)hereandthere.Itseemsasiftheywereperformingafieldconcert.Thefrogisabeneficialcreaturethatdoesgoodtohumanbeings.Theycancatchfast-movinginsects.Eachfrogeatsalargenumberof...
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