单词:colloidal gels
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For 40 years, Paul Karason was a fair skin son of the American Northwest, freckles and reddish-blond hair. Like most people who grow older, Pauls hair turned white. But how does he explain this? What was that Aha moment were you think, you know, my
-Sheldon:Worst renaissance fair ever. renaissance:文艺复兴 fair:集市,集会 史上最逊的文艺复兴集会。 -Leonard:Please let it go, Sheldon. 别再墨迹了Sheldon。 -Sheldon:It was rife with historical inaccuracies. be rif
DEVELOPMENT REPORT - Aid Group Designs System to Make Dirty Water Safe to Drink By Jill Moss Broadcast: Monday, October 17, 2005 This is Steve Ember with the VOA Special English Development Report. Ea
Broadcast: May 5, 2003 By Jill Moss This is the VOA Special English Development Report. Each year more than two-million people die from diseases caused by drinking dirty water. That is the estimate of
This is Scientific American 60 second Science, I am Sophie Bushwick, got a minute~ Theyre called hydogels: Jell-O-like materials made of networks of long-chain molecules in water. And theyre as flexible as living tissue. But hydrogels could not recov
Smart Bandages to Heal Wounds More Quickly 智能绷带有助更快治愈伤口 Scientists say new made-made materials equipped with sensors could turn bandages into a valuable tool for health care workers. Simple bandages are usually seen as the fir