portrait of child boy talking to friends while doing a model of solar system at school - 科學博覽會 個影片檔及 b 捲影像00:10
child students celebrating after finishing model of the solar system during class at school - 科學博覽會 個影片檔及 b 捲影像00:07學生, 擊掌
child students celebrating after finishing model of the solar system during class at school - 科學博覽會 個影片檔及 b 捲影像00:11學生, 擊掌, 小學生
portrait of child students talking and doing a model of solar system at school - 科學博覽會 個影片檔及 b 捲影像00:08學生, 微笑
child students talking and doing a model of solar system during class at school - 科學博覽會 個影片檔及 b 捲影像00:08
child students talking and doing a model of solar system during class at school - 科學博覽會 個影片檔及 b 捲影像00:19
child students talking and doing a model of solar system during class at school - 科學博覽會 個影片檔及 b 捲影像00:11
4k two female students presenting robot to their friends for robotics science project - 科學博覽會 個影片檔及 b 捲影像00:26
4k young woman presenting her robot to her friends for robotics science project - 科學博覽會 個影片檔及 b 捲影像00:25學生
young african-american boy examines circuit board and computer chip in home at night, demonstrating enthusiasm and focus online educational session. stem education robotics courses online. - 科學博覽會 個影片檔及 b 捲影像00:18
4k two young men presenting how to build robot with using solar panel to be energy resource to their colleagues - 科學博覽會 個影片檔及 b 捲影像00:16
young african-american boy examines circuit board and computer chip in home at night, demonstrating enthusiasm and focus online educational session. stem education robotics courses online. - 科學博覽會 個影片檔及 b 捲影像00:20
school science fair in nashville, tennessee showing displays on petroleum, radioactivity, speech synthesis, dna, caves, and an animal in glass jar - 科學博覽會 個影片檔及 b 捲影像00:26
people shop eclipse-themed shirts during a science fair at southern illinois university on april 7, 2024 in carbondale, illinois. the university,... - 科學博覽會 個影片檔及 b 捲影像00:11
people shop eclipse-themed shirts during a science fair at southern illinois university on april 7, 2024 in carbondale, illinois. the university,... - 科學博覽會 個影片檔及 b 捲影像00:18
preservers human brain is shown to the camera as it is displayed at the india international science festival on january 19, 2024 at faridabad, india.... - 科學博覽會 個影片檔及 b 捲影像00:17
preservers human brain is shown to the camera as it is displayed at the india international science festival on january 19, 2024 at faridabad, india.... - 科學博覽會 個影片檔及 b 捲影像00:15大腦皮質, 死亡, 人類內臟
preservers human brain is shown to the camera as it is displayed at the india international science festival on january 19, 2024 at faridabad, india.... - 科學博覽會 個影片檔及 b 捲影像00:16大腦皮質
preservers human brain is shown to the camera as it is displayed at the india international science festival on january 19, 2024 at faridabad, india.... - 科學博覽會 個影片檔及 b 捲影像00:17
science fair in nashville, tennessee schools showing students with projects on solar system, seeds, and plants - 科學博覽會 個影片檔及 b 捲影像00:29太陽系
young man with down syndrome giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:07
pair of disabled students giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:14
teacher observing pair of young special needs giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:09
pair of disabled students giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:16
teacher observing pair of young special needs giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:10
young man with down syndrome giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:11
teacher observing pair of young special needs giving an astronomy presentation in the classroom at school - 科學博覽會 個影片檔及 b 捲影像00:11
african american students at school science fair, black teenagers make presentations on ozone layer, chromatography - 科學博覽會 個影片檔及 b 捲影像00:29
young african american students participate in science fair at school, desegregation in education, civil rights era, black history in the united... - 科學博覽會 個影片檔及 b 捲影像00:14
primary student girl presenting and laughing on science exam in front of classroom. stem education private class - 科學博覽會 個影片檔及 b 捲影像00:36
primary student girl presentation science exam in front of classroom. stem education private class - 科學博覽會 個影片檔及 b 捲影像00:14
primary student girl presentation science exam in front of classroom. stem education private class - 科學博覽會 個影片檔及 b 捲影像00:09
harpeth hall high school girl's science fair, tuberculosis, polio, model of eyeball, mitosis, school uniform - 科學博覽會 個影片檔及 b 捲影像00:23
science fair, internal organs of horse, model airplane, radio technology, visual aids and posters describe scientific research and innovations,... - 科學博覽會 個影片檔及 b 捲影像00:26
zone electrophoresis is an electrophoretic separation technique typically used for analyzing proteins, nucleic acids, and biopolymers. - 科學博覽會 個影片檔及 b 捲影像00:25
mid state science and engineering fair at vanderbilt university, nashville, tennessee, exhibits include nuclear fall out from atomic bomb - 科學博覽會 個影片檔及 b 捲影像00:35
kids talking about a solar system model before a presentation in the classroom - 科學博覽會 個影片檔及 b 捲影像00:31
kids talking about a solar system model before a presentation in the classroom - 科學博覽會 個影片檔及 b 捲影像00:22
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:11
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:19
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:14
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:17
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:47
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:06
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:36
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:11
girls doing a presentation about the solar system in the classroom - using a face mask - 科學博覽會 個影片檔及 b 捲影像00:17
