Because from trillions of miles away, these small planets get lost in the blinding glare of their stars'brightness. 因为从几万亿光年外看，这些小行星会被周围恒星的耀眼光芒所埋没。 The sad truth of the matter is that eart...
Water allows the sand grains to flow to gather and intermingle and form more complex structures. 水可以使沙粒流动到一起并相互粘连并形成更复杂的结构。 In the same way, water acts like a cocktail mixer, allowing the atoms and...
Those planets are all going to be so hot, and you can't develop something as complex as life. 那些星球都太热了，如生命这类复杂事物根本无法在那里诞生。 Scientists have gone back to the drawing board, looking to find worlds...
Are we alone?And it ties into all the big questions: how do we get here? where are we going?Are we a part of a bigger picture? 我们是否孤单这个问题又涉及到其他大的疑问,比如我们来自何方，又要去到哪里?我们是不是一...
For thousands of years, we've wondered if we are alone in the cosmos. 数千年以来，我们都在思索我们在宇宙中是否孤单。 Life, is it a one-time event, or it's something that's occurred lots of times throughout the universe? 生命仅...
UNIT 3 Let's Go Further\n [au:]第三单元 拓展学习\n [00:06.26]Story Time\n [au:]故事时间\n [00:08.69]1 Look and listen. Then read act out the story.\n [au:]1 看一看，听一听然后表演下面这个故事。\n [00:17.34]Mother: Look!...
汤姆和丹尼尔走在上学的路上，两人聊起了UFO，丹尼尔说他见过UFO，而且还和外星人说了话。这是真的吗？ Listen Read Learn Tom: Do you believe in UFOs? Daniel: Of course, they are out there. Tom: But I never saw them. Daniel: Are you stupid? They are called...
