单词：polymerizers
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This is Scientific American's 60-Second Science. Im Cynthia Graber. This will just take a minute. Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because
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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?. [Spray sound.] Killing bugs? No. [Spray sound.] Deodorizing the bathroom? No. [Spray sound.] Checking for explosives, yes. Because chemists at the University of Califor
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A: Hi, I am your waitress, Mary. B: Hello, Mary. We are all pretty hungry tonight! A: While you are looking over the menu, can I interest you in an appetizer? B: An appetizer sounds good. Do you have a special menu? A: They are listed on the first pa
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A: My name is Mary, and I will be your waitress tonight. B: Thank you, Mary. We have been looking forward to trying out this restaurant. A: Before your main course, would you like to order an appetizer? B: Sure, that sounds great. Where are your appe
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A: My name is Mary, and I will be your server this evening. B: Hi Mary. We are really looking forward to a great meal here. A: Can I interest you in an appetizer to start out? B: I would love an appetizer. Are they listed in the menu? A: We have our
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