Teenage Boy in Lab Coat Smiling and Pointing in Science Classroom
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Caucasian tutor guiding student at desk, adult woman pointing with pen while student listens and writes notes, laptop and potted plant on
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US - 1950 - in this drama, a narrator explains about hot rod cars and racing while the camera shows several car models and mechanics working on them and improving the motors.
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US - 1959 - in this crime film, a detective talks about his temporary transfer to Brooklyn, NY, and then turns on his projector, showing a slide of a mobster and discussing a local gang of thieves.
Young Medic Student Engaged in Chemistry Lesson with Professor
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US - 1959 - in this crime film, a narrator explains how a team of private detectives helps a couple get a wedding license. The paranoid groom arrives early at the bride's apartment, surprising her friend.
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US - 1955 - in this western, a cowboy and his little sister try to convince a judge not to use the telegraph. Finally, he agrees and is willing to listen to their plan.
A brunette girl in round and in a business uniform presents her idea on a stand while working in an office and business meeting at the table
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US - 1989 - in this documentary, with a factory in the background, the effects of hydrogen fluoride on plant life are explained. A citrus tree displays marginal chlorosis of its leaves as a result.
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USA - 1929 - The mortality rate of appendicitis has risen in the US over the last ten years, without an explanation why.
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FRANCE - 1948- in this documentary, the narrator explains why harvested milk should be kept at a certain distance from the barn and discusses the cheaper method of milk conservation in ice. Workers load large blocks of ice onto a truck.
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US - 1976 - in this documentary, with the help of images and visuals, a narrator explains how a tornado is formed.
Handheld shot of man pointing at graph on whiteboard indoors
Caucasian male handsome student at University sitting at desk in front of teacher and asking question. Rear of professor speaking in front
Heres How Handwriting Using Black Marker On Glass
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Close up of people talking to the camera, businessman gesturing during presentation in office with w
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Experienced caucasian tutor reviews student answers with focused feedback, pen and paper evaluation at desk, natural window light, careful
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USA - 1955 - Ice melts on an oven and an animation of molecules is shown. An explanation of steam is described and the states of matter are displayed.
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USA - 1955 - Kids throw snowballs. An explanation of why hands get cold in the snow is described.
Group of scientists investigating hurricane as consequence of global warming on earth. Elements of this image furnished by NASA
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Doctor shows woman medical records to husband in clinic ward
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US - 1929 - in this comedy, at a movie premiere, something goes wrong with the film reel, and the horse on the screen is talking instead of the actor who plays the cowboy. The film star who is seated in the front row gets up and explains.
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FRANCE - 1923 - in this silent drama, a woman explains to a private detective why she stole her marriage contract from her husband, and tries to get it back. He clarifies that among the stolen papers was a very important document.
Group of scientists investigating hurricane as consequence of global warming on earth. Elements of this image furnished by NASA
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Caucasian tutor coaching student at home desk with books and lamp, softlit living room session, woman in sweater explains grammar rules from
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Close up of people talking to the camera, pointing at table, person making gestures with hands in bu
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Vertical video. Real estate agent shows modern house to a young Young client rent investment.
A young woman shares her thoughts in a park
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US - 1976 - in this documentary, a narrator explains how employees at the National Severe Storm Forecast Center predict high probabilities of the formation of a tornado. Then, a warning is issued on the radio.
Medium shot of young Biracial male engineer with digital tablet demonstrating new digital solar power system model on multimedia screen at scientific conference, developing sustainable technologies
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Senior Woman Talking Expressively on Smartphone Call
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Close up of people talking to the camera, gesturing with hands, person explaining or communicating s
Business people discussing data on screen
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Close up of people talking to the camera, businesswoman in blue blouse explaining at office desk
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Close up of people talking to the camera, woman in blue blouse explaining something at office desk
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FRANCE - 1918 - in this propaganda film, scenes from the trenches are filmed with accompanying commentary in the title cards.
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Close up of people talking to the camera, gesturing with hands, woman in business attire explaining
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Close up of people talking to the camera, gesturing with hands, businesswoman explaining during meet
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Close up of people talking to the camera, hands clasping together on white surface, wearing wristwat
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Close up of people talking to the camera, gesturing with hands, person in red shirt explaining somet
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Close up of people talking to the camera, gesturing with hands, man in red shirt explaining somethin
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Close up of people talking to the camera, explaining, man in red shirt gesturing at desk
A young man shares his thoughts in a city at night - closeup
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Close up of people talking to the camera, sitting at desk, man in beige sweater smiling and looking
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Close up of people talking to the camera, man sitting at red table, gesturing with hands, wearing ca
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Close up of people talking to the camera, gesturing with hands, man in striped shirt explaining some
Young Business Manager Explains Startup Idea in Home Office
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Close up of people talking to the camera, pointing at wooden table, person explaining something with