单词：fluorine 19
单词：fluorine 19 相关文章
If you don't believe in Yourself, No one else will. People don't respect or follow anyone who doesn't have confidence in themselves. I think the universe tends to trust us to the degree we trust ourselves. 如果你不相信自己，没有人会相信你
瞬间秒杀听力
Teen pregnancy is tough, even in good times. But Nate Howell and his 16-year-old girlfriend are facing parenthood during an economic downturn. We met Nate last May as he graduated from Central High in Elkhart, an Indiana town hit hard by hard times.
万花筒2010年
A cluster of villages in China's Guizhou province has been plagued by an outbreak of disease that damages teeth and bones. Now, a new study by Chinese and American researchers puts the blame on polluted coal burned in home fireplaces. In small quanti
VOA标准英语2010年(十)月
Why Teflon Is Slippery Teflon is the trademark name for PTFE, a type of plastic. If you own any non stick cookware, then you probably use PTFE on a daily basis. You might not realize, as you fry your morning eggs, that PTFE is one of the most slipper
英语时差8，16
Why Teflon Is Slippery？ 1954年，法国工程师马克格雷瓜尔(Marc Gregoire)的妻子柯莱特(Colette)突发奇想，觉得丈夫用来涂在钓鱼线上防止打结的不粘材料特氟龙(Teflon)如果可以用在煎锅上，效果一定不错
英语听力文摘 English Digest