scientist in laboratory with glassware and turntable where glass marbles drop onto tops of test tubes - 燒瓶 個影片檔及 b 捲影像00:25
scientist amid broad array of lab glassware uses pipette to transfer fluid to flask then turns valve to pour liquid into beaker; two triangular... - 燒瓶 個影片檔及 b 捲影像00:49
woman in lab coat with laboratory equipment / vs spherical flasks with liquids of varying colors swishing back and forth over artificial light... - 燒瓶 個影片檔及 b 捲影像00:53
woman in lab coat pouring red liquid from glass bottle into tall glass cylinder filtering liquid into a flask/ audio - 燒瓶 個影片檔及 b 捲影像00:06
cu, selective focus, scientist pouring fluorescent liquid in lab flask, atlanta, georgia, usa - 燒瓶 個影片檔及 b 捲影像00:10
cu, scientist observing blue liquid bubbling in lab flask, atlanta, georgia, usa - 燒瓶 個影片檔及 b 捲影像00:05
cu, scientist putting droplets of green liquid in lab flask, atlanta, georgia, usa - 燒瓶 個影片檔及 b 捲影像00:11
cu, td, scientist putting droplets of green liquid in lab flask, atlanta, georgia, usa, ws - 燒瓶 個影片檔及 b 捲影像00:13水滴
cu, selective focus, scientist mixing liquid in lab flask, atlanta, georgia, usa - 燒瓶 個影片檔及 b 捲影像00:09白人