a young beautiful african - american scientist writing formulas on a glass board in a modern laboratory - 分子結構 個影片檔及 b 捲影像00:24女人
water phase changes. molecular model of an ice lattice, that melts into liquid water and then evaporates into water vapour (gas) - 分子結構 個影片檔及 b 捲影像00:18格子
water phase changes. molecular model of an ice lattice, that melts into liquid water and then evaporates into water vapour (gas) - 分子結構 個影片檔及 b 捲影像00:15格子
water phase changes. molecular model of an ice lattice, that melts into liquid water and then evaporates into water vapour (gas) - 分子結構 個影片檔及 b 捲影像00:15
water phase changes. molecular model of an ice lattice, that melts into liquid water and then evaporates into water vapour (gas) - 分子結構 個影片檔及 b 捲影像00:21格子
video render of computer generated image of pink deformed cube with a mesh of particles on blue background - 分子結構 個影片檔及 b 捲影像00:10
students walk in school courtyard / students walk near school building / students watch educational television program / students build molecular... - 分子結構 個影片檔及 b 捲影像00:36
locusts eat / locusts mate / locusts climb on to cage / molecular model structure turns - 分子結構 個影片檔及 b 捲影像00:24
production of tin oxide and demonstration of pouring process in southwest england / united kingdom - 分子結構 個影片檔及 b 捲影像00:46
close-up of blurred green marbles rolling into view on an overexposed backlit surface. - 分子結構 個影片檔及 b 捲影像00:05
close-up view as blurred green marbles roll into view on an overexposed backlit surface. - 分子結構 個影片檔及 b 捲影像00:06