And I think you can test that by asking the question: if you could educate a child by the age of six.

你们可以通过,问这个问题来验证：,你能教育6岁的孩子吗。

麻省理工公开课 - 媒体、教育、市场课程节选

And this was experimentally validated, hopefully, even more clearly than our experiment here.

而且这是通过实验验证的，比我们这里的实验更为清楚。

麻省理工公开课 - 化学原理课程节选

You can easily check by taking two derivatives that this particle does have the acceleration a.

你可以很容易地通过求两次导来验证,这个质点的加速度确实为 a

耶鲁公开课 - 基础物理课程节选