translation.en: This is actually a brainwave sensor that's reading the electrical activity of my brain These brainwaves are being analyzed and we can see them as a graph.
translation.zh: 这其实是一个脑电波感应器。 在我做演讲的时候它可以读出 我大脑中的电波活动。 然后对这些脑电波进行分析。我们可以看这个图，