She is an expert in the development and genetics of immune deficiency viruses in primates.

VOA: special.2009.09.08

And by here, I mean it's net neutral, but the electron deficiency.

我的意思它是电中性的，只是有些缺电子。

麻省理工公开课 - 固态化学导论课程节选

So iodine deficiency was a real problem and then salt started getting fortified with iodine, and that really corrected a lot of those deficiency problems around the world.

碘缺乏曾经是个大问题,随着加碘盐的逐渐普及,使得全球诸多碘缺乏问题得到了改善

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Extreme vitamin D deficiency causes deformities in children and weak bones in adults.

VOA: standard.2010.05.28