Well, to continue, as I mentioned earlier, there is also research that demonstrates that individuals perform worse, not better on tasks when other people are there.
出自-2012年12月听力原文
英语六级真题
This important study demonstrates that the more fiber you eat during your high school years, the lower your risk is in developing breast cancer in later life.
2017年6月六级真题（第二套）听力 Section B
柯林斯高阶英汉双解学习词典释义
VERB
证明;论证;表明;说明
To demonstrate a fact means to make it clear to people.