These students are taking part in experiments designed to test their knowledge and inspire them to concentrate on science,technology, engineering and math.

VOA: standard.2010.05.10

But by doing some science fiction experiments, we can take them apart and ask ourselves, Which one do I think is me?

但通过做一些科幻实验，我们可以把它们分开，并问自己，我认为哪一个才是我？

耶鲁公开课 - 死亡课程节选

President Obama will be directly involved in one aspect of the campaign a White House science fair that will showcase top student experiments from across the country.

VOA: standard.2009.11.24