Now they will be able to identify genes for any desired trait, improving quality,nutritional value and disease resistance.

VOA: special.2009.11.03

Now how it might be able to offer some quality of life improvement for these patients.

现在，我们如何帮助这些病人,提高他们的生活质量。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Existing supplies may not be high quality or developed correctly for local needs.

VOA: special.2009.05.05

Improving the quality of the boots was a requirement to be able to bid for the military contract.

VOA: standard.2010.07.06