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(单词翻译:双击或拖选)
This is Scientific American 60-Second Science, I’m Cynthia Graber. This will just take a minute.
Here’s one space mission that is definitely going to be unmanned—NASA is going to the sun. The Johns Hopkins University Applied1 Physics Laboratory is building a craft that will visit the sun’s corona2. It’ll speed past the sun at 125 miles per second, be pelted3 with energized4 dust, and exposed to radiation and temperatures up to 2,600 degrees Fahrenheit5.Scientists have been trying to figure out how to send such a probe for decades, but the technology didn’t exist at a feasible cost until now. The probe will circle the sun for seven years until it reaches its closest approach, about 4.1 million miles from the sun. That’s eight times closer than previous missions. It’ll provide data on a variety of phenomena6, such as magnetic fields, solar winds, dusty plasma7 and energetic particles. Such subjects are more than just interesting—researchers say that understanding energetic particles that zip our way from the sun can affect cell phones and power grids8 here on the ground, and could threaten the health of astronauts in orbit. The probe is scheduled to launch in 2015.
Thanks for the minute for Scientific American 60-Second Science, I’m Cynthia Graber.
1 applied | |
adj.应用的;v.应用,适用 | |
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2 corona | |
n.日冕 | |
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3 pelted | |
(连续地)投掷( pelt的过去式和过去分词 ); 连续抨击; 攻击; 剥去…的皮 | |
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4 energized | |
v.给予…精力,能量( energize的过去式和过去分词 );使通电 | |
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5 Fahrenheit | |
n./adj.华氏温度;华氏温度计(的) | |
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6 phenomena | |
n.现象 | |
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7 plasma | |
n.血浆,细胞质,乳清 | |
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8 grids | |
n.格子( grid的名词复数 );地图上的坐标方格;(输电线路、天然气管道等的)系统网络;(汽车比赛)赛车起跑线 | |
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