close up pan green liquid bubbling in flask / flowing through tubing / red liquid dripping into test tube - 鐵支架 個影片檔及 b 捲影像00:14水滴
reenactment medium shot scientist louis pasteur looking through microscope / tracking shot rabbits in cage - 鐵支架 個影片檔及 b 捲影像00:1819世紀風格
close up tilt up studio shot of seedling in test tube clamped to stand / london - 鐵支架 個影片檔及 b 捲影像00:18
high angle medium shot lab technician measuring ph levels and temperature of milk samples + recording on clipboard - 鐵支架 個影片檔及 b 捲影像00:20
high angle medium shot lab technician recording measurements from digital display of ph meter in log book - 鐵支架 個影片檔及 b 捲影像00:04
high angle medium shot lab technician measuring ph and temperature of milk sample in beaker with digital ph meter - 鐵支架 個影片檔及 b 捲影像00:09
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:16
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:14
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:20
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:10
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:12
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:23
young beautiful scientist is using a test tube to mix chemical dyes for medical. - 鐵支架 個影片檔及 b 捲影像00:19
female chemist checking for chemical changes in the bigger on the chemical shelf and teach students to record changes. - 鐵支架 個影片檔及 b 捲影像00:11
female chemist checking for chemical changes in the bigger on the chemical shelf and teach students to record changes. - 鐵支架 個影片檔及 b 捲影像00:12
female chemist checking for chemical changes in the bigger on the chemical shelf and teach students to record changes. - 鐵支架 個影片檔及 b 捲影像00:22
female chemist checking for the smell of chemicals and the concentration of chemicals in the bigger on the chemical shelf. - 鐵支架 個影片檔及 b 捲影像00:19
female chemist checking the concentration of chemicals in the bigger on the chemical shelf and take notes. - 鐵支架 個影片檔及 b 捲影像00:09
female chemist checking for the smell of chemicals and the concentration of chemicals in the bigger on the chemical shelf. - 鐵支架 個影片檔及 b 捲影像00:10
female chemist checking the concentration of chemicals in the bigger on the chemical shelf and take notes. - 鐵支架 個影片檔及 b 捲影像00:12
female chemist checking the concentration of chemicals in the bigger on the chemical shelf and take notes. - 鐵支架 個影片檔及 b 捲影像00:06
teacher teaching science subjects by teaching about astronomy simulations teacher giving students to wear glasses 3d to meet the constellation simulation. - 鐵支架 個影片檔及 b 捲影像00:14
teacher teaching science subjects by teaching about astronomy simulations teacher giving students to wear glasses 3d to meet the constellation simulation. - 鐵支架 個影片檔及 b 捲影像00:09
asian female teacher teaching science subjects by experimenting with dropping some substances into the bigger to give a chemical reaction. - 鐵支架 個影片檔及 b 捲影像00:09
asian female teacher teaching science subjects by experimenting with dropping some substances into the bigger to give a chemical reaction. - 鐵支架 個影片檔及 b 捲影像00:08
teacher is teaching chemistry to students teacher teaching students to drop chemicals on slides and use a microscope to look chemicals. - 鐵支架 個影片檔及 b 捲影像00:13
teacher is teaching chemistry to students teacher teaching students to drop chemicals on slides and use a microscope to look chemicals. - 鐵支架 個影片檔及 b 捲影像00:13
teacher is teaching chemistry to students a teacher is teaching students to take notes of results experiment. - 鐵支架 個影片檔及 b 捲影像00:14
female teacher is teaching elementary school students to record the results of an experiment. - 鐵支架 個影片檔及 b 捲影像00:09
asian female teacher is teaching science subjects to elementary school students teacher is teaching students to mix chemicals. - 鐵支架 個影片檔及 b 捲影像00:13
female teacher is teaching elementary school students to record the results of an experiment. - 鐵支架 個影片檔及 b 捲影像00:05
asian female teacher is teaching science subjects to elementary school students teacher is teaching students to mix chemicals. - 鐵支架 個影片檔及 b 捲影像00:07
teacher is teaching chemistry to students a teacher teaches students to use a microscope to look chemicals on slides. - 鐵支架 個影片檔及 b 捲影像00:13
teacher is teaching chemistry to students a teacher teaches students to use a microscope to look chemicals on slides. - 鐵支架 個影片檔及 b 捲影像00:07
students studying science students try to drop chemicals on slides and using a microscope to look chemicals. - 鐵支架 個影片檔及 b 捲影像00:20
teacher is teaching science subjects to students a teacher is taking the children to conducting an experiment. - 鐵支架 個影片檔及 b 捲影像00:14
teacher is teaching science subjects to students a teacher is taking the children to conducting an experiment. - 鐵支架 個影片檔及 b 捲影像00:18
schoolgirl studying science and conducting experiments in a lab full of equipment. - 鐵支架 個影片檔及 b 捲影像00:11
schoolgirl studying science and conducting experiments in a lab full of equipment. - 鐵支架 個影片檔及 b 捲影像00:15
scientists look at the reaction that is obtained during the experiment with the help of flammable substances - 鐵支架 個影片檔及 b 捲影像00:28