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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Breaking a mirror means seven years bad luck. So does spilling salt or meeting a black cat. Weve all heard such silly-sounding superstitions. Of course w
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By Greg Flakus San Antonio, Texas 06 January 2006 Dry conditions and high winds are making life difficult for firefighters in Texas, where wildfires continue to threaten life and property in various p
2006年VOA标准英语（一月）
Scientists Create Blackest Material Ever Of all the black things in the universe only the infamous black holes are so black that not even a tiny amount of light can bounce back. But scientists have managed to create material almost as black, and it h
VOA标准英语2014年(七月)
[00:00]A：What a day. I mean, it just doesn't get any better than this, you know? [00:06]Even the star's out. Not going to find a star like that in the wild. [00:16]Marty. Buddy. Listen. Everybody has days when they think the grass might be greener
英美人天天都在说的4000句:跟着影视学最真实的口语
Todd: OK, Michael, you are into spear fishing! Michael: Yes, I enjoy going spear fishing Todd: OK. Can you talk about that a bit. Michael: Yeah, sure. Spear fishing basically is a sport that you dive under the wate with the aid of flippers, wet suit
原版英语对话1000个
A man of the state of Chu had a spear and a shield for sale．Hew as loud in praises of his shield．My shield is so strong that nothing can pierce it through． He also sang praises of his spear．My spear is so sharp that it can pierce through anyt
趣味英语