原文已被隐藏，你可用 快捷键 - 或点击 显示原文 按钮来查看原文
第1段
1 .This is Scientific American 60-Second Space. I'm Clara Moskowitz. Got a minute?
该句暂无译文！
2 .Dust is a major annoyance for most of us, but to scientists it can be precious.
该句暂无译文！
3 .Over the summer researchers identified seven specks of dust returned to Earth by the Stardust spacecraft,
该句暂无译文！
4 .which spent 12 years in space and tried to collect samples from the wake of a comet.
该句暂无译文！
5 .The seven dust motes may come from interstellar space.
该句暂无译文！
6 .Determining their true origin, however, has proven problematic.
该句暂无译文！
7 .Three of the microscopic grains are locked in a foam material called aerogel, from the outside covering of Stardust.
该句暂无译文！
8 .Aerogel is great at catching the particles, but scientists have not yet figured out a good way to extract the grains without damaging them.
该句暂无译文！
9 .For now, the grains, and the researchers, are stuck.
该句暂无译文！
10 .The other four interstellar dust candidates were found in the grid of aluminum foil that held the aerogel.
该句暂无译文！
11 .When the grains hit, the foil melted and formed miniature craters.
该句暂无译文！
12 .Scientists chemically analyzed two of these craters, but the findings are inconclusive.
该句暂无译文！
13 .The impactors might come from interstellar space, or they could be local.
该句暂无译文！
14 .Unfortunately, the analysis destroyed those two grains.
该句暂无译文！
15 .And the other two foil-embedded candidates were lost while being transported between labs.
该句暂无译文！
16 .Scientists hope to find still more microscopic particles in the Stardust collector.
该句暂无译文！
17 .And they have keep NASA cleaning crews from doing any dusting.
该句暂无译文！
18 .Thanks for the minute, for Scientific American 60-Second Space. I'm Clara Moskowitz.
该句暂无译文！