She noticed there was a real void in quality STEM education at all levels of the public educational system.

她注意到，不同等级的公共教育体系都确实存在高质量 STEM 教育的缺失。

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By contrast, the large zebra lives on the masses of low-quality stem material.

相比之下，大型斑马依靠大量的低质量茎材料为生。

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Thus, the value of going to a movie together does not stem mainly from the quality of the movie but from watching it together.

这样，一起去看一场电影的价值并非主要来自电影的质量，而是来自你们一起看这件事。

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An excellent piece with the unusual quality of stem cell truth, something very rare in North America.

FORBES: How Politics Body Slams Science

However, there are still questions about the quality of stem cells produced using this method compared with embryonic stem cells.

BBC: Embryonic stem cells: Advance in medical human cloning

Change the Equation is a non-profit organization dedicated to mobilizing the business community to improve the quality of STEM education in the United States.

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