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SSS 2011-08-19

时间：2011-09-05 06:05:56

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（单词翻译）

 Some graduate students in science, technology, engineering and math—or STEM—only do research, under the guidance of a mentor1. Other STEM grad students also have teaching responsibilities, for example, instructing undergrads or local high schoolers. Now a study finds that grad students who also teach show significant improvement in written research proposals, compared with grad students with no teaching requirement. The finding appears in the journal Science. Researchers followed almost a hundred grad students attending three different institutions. About half of the students also taught. All the grad students were asked to submit written research proposals at the beginning of an academic year and a revised version again at the end. And those grad students who spent the year doing research and teaching showed bigger improvements in coming up with testable hypotheses and in the design of valid2 experiments.

 
Differences in overall written quality among the students could not account for the results, because only specific skills among those analyzed3 showed improvement as a function of the teaching experience. So teaching may make STEM grad students better scientists. Not to mention better teachers.
 
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Steve Mirsky.

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1 mentor s78z0     
n.指导者，良师益友；v.指导
参考例句：
  • He fed on the great ideas of his mentor.他以他导师的伟大思想为支撑。
  • He had mentored scores of younger doctors.他指导过许多更年轻的医生。
2 valid eiCwm     
adj.有确实根据的；有效的；正当的，合法的
参考例句：
  • His claim to own the house is valid.他主张对此屋的所有权有效。
  • Do you have valid reasons for your absence?你的缺席有正当理由吗？
3 analyzed 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 )；分解；解释；对…进行心理分析
参考例句：
  • The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程，因为对他来说，爱是个不可分析的迷。 来自《简明英汉词典》

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