关注微信领¥50

百门课程¥0元


50万+已关注

科学美国人60秒:太空船自我修复挽救宇航员性命

2016-12-05 17:02:06来源:科学美国人60秒

点击查看>>科学美国人60秒音频:太空船自我修复挽救宇航员性命

  科学美国人60秒中英文翻译:太空船自我修复挽救宇航员性命

  科学美国人60秒英文文本

  It's a scenario straight out of Hollywood:

  You're up in a spacecraft, "you've got this capsule around you," and a loose bolt, a piece of space junk, is zooming your way.

  "And it's going really fast.

  It's going to very likely pass through your spacecraft and leave both entry and exit holes.

  So all of a sudden now your atmosphere is rushing out those holes, and you want them sealed right away."

  That's Timothy Scott, a polymer scientist at the University of Michigan, Ann Arbor.

  He and his team have devised a potential solution to this space disaster:a material that patches itself up, less than a second after impact.

  Think of an ice-cream sandwich.

  "The central part, the ice cream of our sandwich, is a liquid resin."The cookie parts are sheets of thermoplastic.

  When a projectile—or piece of space junk—punctures the sandwich,it exposes the liquid part to the ship’s oxygen, which causes it to solidify, patching the hole.

  The researchers tested sheets of the self-healing material at a firing range, filming the results with high-speed video.

  And indeed, the material worked fine here on Earth,but they say the findings will have to be replicated under pressure conditions like those you'd find in space.

  The results are in the journal ACS Macro Letters.

  The space station is already well protected by bumpers that vaporize particles on impact.

  But protection doesn't come cheap.

  "It turns out that robust things are also very heavy.

  The intent of this is really to provide a backup that's very low weight."

  It costs some 10,000 a pound to launch equipment into space today.

  So a lighter weight material could save money—and lives.

  中文翻译请点击下一页

为你特别匹配的托福超值课程,快速提分先人一步!
  • 托福12月公益课(第2期)

    托福12月公益课(第2期)

    特点:1天1节公益课,讲干货有实力,高效备考,快速突破!

    课时:10小时

    查看详情
  • 【活动价】新东方托福名师在线一对一(体验课)

    【活动价】新东方托福名师在线一对一(体验课)

    适合人群:想体验新东方在线致赢托福1对1辅导冲分课程的同学

    体验课时:30分钟

    查看详情
  • 大学生旗舰直达班 (冲110分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数110分!

    课时:343

    查看详情
  • 大学生旗舰直达班 (冲100分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数100分!

    课时:331

    查看详情
  • 大学生旗舰直达班 (冲90分)

    【知心托福】大学生旗舰直达班 (冲90分)

    适合人群:托福目标分数90分!

    课时:310

    查看详情
全部课程>>
单项突破
直播课堂

更多托福课程
新东方25年教学经验沉淀
托福考生必修课
托福考生,高效提分,安心之选

查看详情>>
更多>>
更多课程>>
更多>>
更多内容
更多>>
距结束 : 00 00 00 00

4小时甩掉“Broken English”,直击托福24+

实战经验分享三人成团免费学

口语6大题精讲;16天社群打卡学习&答疑 活动日期 : 2018.11.08-2018.12.13

价格 : ¥69

678人 已报名

查看详情
更多>>
更多公开课>>
更多>>
更多课程>>