[网络] 四元聚合物

SSS 2008-08-08

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Ever been woken up by the sound of the refrigerator compressor kicking on? Well, such clumsy heat exchange units featuring long metal coils may be on their way out. Becaus

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Scientific American(八)月

AP美联社一分钟新闻(2010-01-23)

This is AP News Munite. UN officials say more than 73,000 people in Haiti have received food last week but many more still wait. Some desperate crowds turn to looting to get what they need six days after the earthquake. Haitian authorities say they h

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美联社新闻一分钟2010(一月)

购物英语会话-After Trying on the Sweater(3)

A: Does it look too small? B: It fits you to a T. A: I agree. I'm going to buy it. B: Cash or charge? A: I'll charge it. B: Sign here, please. A: There you go. B: Good-bye, and thank you for shopping here.

发表于:2019-01-20 / 阅读(76) / 评论(0)

购物英语对话

购物英语会话-After Trying on the Sweater(1)

A: What do you think? B: It looks great. A: I would like to purchase it. B: Will this be cash or charge? A: Here, take my credit card. B: Just sign here, please. A: Sure. Here you go. B: Here's your receipt. Have a nice day.

发表于:2019-01-20 / 阅读(65) / 评论(0)

购物英语对话

新型显示屏薄如纸张可随意弯曲

最近有科学家正在研发一种全新的电子纸技术，这种电子纸其实就是一种超薄的柔性显示屏，具有很高的能效性，并且在阳光直射或明亮环境中也可以清晰地显示出内容。这种柔性显示屏的厚

发表于:2019-02-03 / 阅读(27) / 评论(0)

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2006年VOA标准英语-Conserving Water with Waterless Toilets

By Greg Flakus Mexico City, Mexico 07 April 2006 watch Waterless Toilet report At the recently held Fourth World Water Forum in Mexico City, hundreds of governmental agencies, international organizati

发表于:2019-02-03 / 阅读(120) / 评论(0)

2006年VOA标准英语（四月）

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