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Now, try to imagine 1,000 million years! 现在试着想象10亿年（有多长）！ At that time there were no large animals, just creatures like snails and worms. 当时还没有巨型动物，只有蜗牛和虫这样的生物。 And before then t
世界小史
M: Excuse me! W: May I help you? M: Yes, I'd like to send this book to France. W: Let me weight it first. That'll be 14 dollars. M: Can it go in an envelop? W: Of course, it's 4 dollars now. M: Do I need stamps? W: No, you don't. We use computers no
想聊就聊
Many regions within these clouds can stay like that for ever for millions of years until something happens, a trigger and then a star forms.The trigger for such a monumental event doesn't have to be much, two clouds conbine as they pass, or a distant
探索与发现2015年
Clouds, they are fluffy, white and full of mystery. Although scientist may have better handle on clouds, even they don't know at all. Because the new study can show that atmosphere gases can help clouds form in a way no one had ever considered. That'
Scientific American(二)月
M: Excuse me! W: May I help you? M: Yes, I'd like to send this book to France. W: Let me weight it first. That'll be 14 dollars. M: Can it go in an envelop? W: Of course, it's 4 dollars now. M: Do I need stamps? W: No, you don't. We use computers now
英语口语
I left out in a cloud of taillights and dust Swore I wasn't coming back, said I'd had enough Saw you in the rear view standing fading from my life But I wasn't turning around, no not this time but Chorus: Don't Think I Don't Think About It Don't thin
美国乡村音乐