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.
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。