首先是科学及心理层面：那就是二十岁年轻人的大脑和身体可能并没有如我们所想的那样发育成熟；
The first level is science and psychology: it's the idea that 20-somethings' brains and bodies might not be as grown up as we thought.
法国奥尔德巴伦机器人研究公司（Aldebaran Robotics）研制的机器人Nao是类人型机器人，它外形小巧可爱，全自动、可编程、拥有良好的认知能力，身体还可以自由转动25度来完成高难度的动作。 科学家曾把它们组成足球队参加国际性的机器人比赛——机器人世界杯足球赛。
The Nao Robot by Aldebaran Robotics, is an amazingly advanced bot that boasts cognitive skills, a high level of motion with 25 degrees of freedom and its programmable.
科学家们推理说，暗物质一般不与大多数其他物质作用，他们认为暗物质会直接穿过地球、房屋甚至是人的身体，并不会被原子所弹开。
And dark matter doesn't often interact with most other matter, scientists theorize. One idea is that it flies right through the Earth, your house, and your body without bouncing off atoms.
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