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Young blonde woman standing over pink background disgusted expression, displeased and fearful doing disgust face because aversion reaction.
Close-up of a car windshield covered in pollen and flower petals, symbolizing the accumulation of allergens during the spring season.
Headshot of young black woman showing fingers thumbs down as refusal sign. Studio portrait of unhappy dissatisfied girl lady expressing dislike isolated on blue background. People emotions concept
Chemical experiment in which Nitric acid (HNO3) is placed in an Erlenmeyer flask with copper chips, causing a violent chemical reaction. Example of a redox reaction in chemistry.
Middle-aged man in suit making a confused facial expression and shrugging, expressing uncertainty or not knowing.

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