【Phat Yeti出品】60-SECOND SCIENCE 官方听力文稿 + 讨论帖 （更新至：2008.03.07）

深海lavenderUID: 2350207

我想到了牛皮糖哈哈.;d:

阿HUID: 2393714

:rolleyes: 你们天真。。我还是学术点。。帮顶！！

深海lavenderUID: 2350207

UP.

jcxjoyUID: 2441303

为什么我找不到60秒在哪里呀???

豆豆～UID: 2378384

Not So Fast On Biofuels

For years advocates have touted the use of biofuels as a clean-burning alternative to gasoline. Now a pair of studies published in the February 8 issue of Science conclude that biofuels may do more harm to the environment than good. The researchers calculated the indirect costs of growing the crops that are turned into biofuels. To plant the corn or sugarcane or soybeans from which biodiesel and bioethanol are made, farmers would first need to clear forests and grasslands. That process, it turns out, would actually generate more carbon dioxide than we’d save by swearing off fossil fuels. And it would take centuries for us to pay off that carbon debt.

For example, the scientists figure it would take 319 years of using ethanol made from soybeans to make up for the extra carbon released by chopping down the forests needed to grow the crop. And of course more CO2 in the atmosphere means more global warming. So biofuels might actually exacerbate the problem they’re meant to solve. Something to think about as we move forward on producing ecofriendly fuels. As one of the scientists put it, we should make sure our cure isn’t worse than the disease.

[ 本帖最后由 豆豆～ 于 2008-2-12 11:21 编辑 ]

深海lavenderUID: 2350207

UP.

阿HUID: 2393714

up

豆豆～UID: 2378384

bump

gjz-gjzUID: 2378122

谢谢

阿HUID: 2393714

远在天边。。近在眼前

wlj9327UID: 2382366

非常感谢~

豆豆～UID: 2378384

Coffee Tasting Machine Stirs Industry

These days, it seems no one’s job is safe from computerized replacements. Now it’s time to add coffee experts to that list. Scientists at the Nestle Research Center in Switzerland have developed a coffee-tasting machine that can sip and evaluate a brew almost as well as professional human tasters. The machine takes a sample of the gases produced by a steaming shot of espresso and analyzes dozens of ions associated with taste and aroma. Those ions are assigned to categories in a “sensory evaluation dataset.” But, that doesn’t mean the results are dry chemical formulas. In fact, the machine has a vocabulary that would make any sommelier jealous. After it crunches the numbers, it spits out words like “flowery,” “woody,” and “butter toffee” to describe its drinking experience.

Researchers say machines like this could be efficient monitors of quality control in the food industry. And no matter how many cups a day it samples, the mechanized coffee taster will never get jittery.  Nevertheless, rumor has it that the machine has already demanded a daily 15-minute anything-but-coffee break.

[ 本帖最后由 豆豆～ 于 2008-2-12 22:39 编辑 ]

thikfyUID: 2339169

豆豆的新头像很赞~

阿HUID: 2393714

up...

Nirvana0219UID: 2303146

狂谢....................................................................................................:loveliness: