translation.en: And it's one of the most interesting technical challenges that's very currently active in the computer sciences: being able to have a camera that can understand, from a fairly big distance away, how these little tiny balls are actually pointing in one way or another to reveal what you're interested in, and where your attention is directed.
translation.zh: 这是一项非常有趣的技术挑战， 在当今的电脑科学领域也相当活跃。 新的科技之下诞生了这样一种摄像头，它可以 即使从很远的距离也可以， 辨明我们这两个小小的眼球是如何一会看向这边一会看向那边 就反映出了你的兴致所在， 以及你注意力又在哪里。