close-up pan over a hand leafing through meticulous scientific calculations from the eighteen hundreds. - 數學符號 個影片檔及 b 捲影像01:04
a math teacher guides a student through completion of an equation on the smartboard. - 數學符號 個影片檔及 b 捲影像00:11
three mathematical formulas into patterns on monitor, turning to see various angled of pattern. planes, intersections, elongated, looping, abstract,... - 數學符號 個影片檔及 b 捲影像00:20幾何圖形
female hand arranging test tubes in holder, female adding material to tube, dolly back female & male working in lab. intelligence: vs girl writing... - 數學符號 個影片檔及 b 捲影像00:44
students sitting at desks writing w/ pencils on paper, male student in letter sweater trying to solve chemistry equation on board. students eating... - 數學符號 個影片檔及 b 捲影像00:15
various shots of a white male's hand writing on a dry-erase board, close ups of a white male's hand writing out algebraic formulas on a white... - 數學符號 個影片檔及 b 捲影像01:36
economy grows by 0.1 per cent; thailand: bangkok:exttrafficwoman at fresh market stallwomen chattingmarket stall - 數學符號 個影片檔及 b 捲影像00:17
elementary school children participating mathematics lesson in classroom solves arithmetic whiteboard observes and learns concepts of primary education classroom learning mathematics and child development. - 數學符號 個影片檔及 b 捲影像00:20
girl student classroom whiteboard math writing lesson education young learner solving arithmetic problem during school class back view - 數學符號 個影片檔及 b 捲影像00:08
fictitious math equations and geometry formulas on black background for education and science. 3d animation - 數學符號 個影片檔及 b 捲影像00:35
increased value of real estate. businessman owner home investment planning real estate business income earning profit investor thinking strategy - 數學符號 個影片檔及 b 捲影像00:07美國
senate minority leader chuck schumer of new york says in daily floor remarks on the 21st day of a government shutdown that it was not far left to... - 數學符號 個影片檔及 b 捲影像01:30
creative binary matrix on white background featuring black skull emoticons on code. blend of technology, digital language, human emotion, ai personality and modern abstract data art. - 數學符號 個影片檔及 b 捲影像00:30翻譯
video illustration of s&p 500 losing 1.95%. u.s. equities traded mostly lower on wednesday following the implementation of president donald trump's... - 數學符號 個影片檔及 b 捲影像00:14當勞·特朗普 - 美國總統
casual businessman typing and using laptop computer with social marketing infographic graph - 數學符號 個影片檔及 b 捲影像00:12廣告
girl, student and solve math's problem in class on whiteboard for education, learning and solution for question. child, writing and knowledge for cognitive development, lesson and growth in school - 數學符號 個影片檔及 b 捲影像00:09
presentation, student and solve math problem in class on whiteboard for education, learning and solution for question. girl, writing and knowledge for development, lesson and growth in school test - 數學符號 個影片檔及 b 捲影像00:05初中
gillian keegan interview; england: london: westminster: milbank:intgillian keegan mp interview sot. - on updating sex education guidance / 100 per... - 數學符號 個影片檔及 b 捲影像04:10
famed physicist albert einstein is greeted at city hall by new york city mayor jimmy walker and columbia university president nicholas murray butler,... - 數學符號 個影片檔及 b 捲影像00:17
writing, math and person planning on glass with research in economy with data analysis and problem solving. woman, expert and test solution with calculation and results on window or board in office - 數學符號 個影片檔及 b 捲影像00:07女人
business woman writing equation on glass board in office for motivation concept. - 數學符號 個影片檔及 b 捲影像00:12
glass wall, hands writing and planning, brainstorming and math equation in office. strategy, idea and person with marker on board for business project, formula and financial analysis of information - 數學符號 個影片檔及 b 捲影像00:11
cu pan student looking closely at computer motherboard in classroom / richmond, virginia, usa - 數學符號 個影片檔及 b 捲影像00:22
hands writing notes, cleaning trains and handing out diplomas / teacher writes on chalkboard / split screen into four scenes of hands giving money to... - 數學符號 個影片檔及 b 捲影像01:03
the medieval manor - part 19 of 37. a 13th century castle in france is brought to life in this film which deals with the relations between master and serf in feudal europe. the picture observes life in the manor hall in the home of one family of serfs - 數學符號 個影片檔及 b 捲影像00:36
magnetic, electric and gravitational fields - part 17 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic - 數學符號 個影片檔及 b 捲影像00:29
magnetic, electric and gravitational fields - part 16 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic - 數學符號 個影片檔及 b 捲影像00:35星球
magnetic, electric and gravitational fields - part 15 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic - 數學符號 個影片檔及 b 捲影像00:35袋鼠
magnetic, electric and gravitational fields - part 8 of 19. evidence of the magnetic field is illustrated by bringing a compass close to a magnet and watching the compass needle. further evidence of an electric field is demonstrated by rubbing a plastic r - 數學符號 個影片檔及 b 捲影像00:33
