And because the key component of solar cells is an expensive, highly purified form of silicon, there's a real economic benefit to this design.

VOA: standard.2010.02.19

Now, in contrast to the land, God's sanctuary can be purified for moral impurity by means of a special sacrifice.

与土地对比，上帝的圣所倒是可以通过一些特殊的献祭,净化道德上的不洁。

耶鲁公开课 - 旧约导论课程节选

Then that subunit was purified and formulated into the vaccine, the kinds of vaccines that you and I got.

然后亚基被纯化出来并制成疫苗,也就是你我被注射的那种疫苗

耶鲁公开课 - 生物医学工程探索课程节选