How it got here: Scottish chemist and physicist Sir James Dewar invented the vacuum flask Iin 1892 as a way to keep liquid nitrogen from warming up and turning into gas in his lab.

它是如何问世的：1982年苏格兰化学家和物理学家James Dewar爵士发明了保温瓶用以防止实验室中的液氮升温而气化。

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Don't let inaccuracy hold you back in lab! This video introduces the proper methods for measuring precise volumes of liquid using pipets burets volumetric flasks and syringes.

不要让不精确在实验室阻碍你！此影片介绍正确方法来使用滴管、滴定管、量瓶和注射器精确测量液体体积。

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Don't let in accuracy hold you back in lab! This video introduces the proper methods for measuring precise volumes of liquid using pipets burets volumetric flasks and syringes.

不要让不精确在实验室阻碍你！此影片介绍正确方法来使用滴管、滴定管、量瓶和注射器精确测量液体体积。

youdao