新东方网留学托福首页托福辅导托福听力正文

老托福听力PartC精选第五期(英文原文+音频)

2013-08-13 11:00

来源:互联网

作者:

  Thank you. It's great to see so many of you interested in this series on "Survival in Outer Space." Please excuse the cameras; we're being videotaped for the local TV stations. Tonight I'm going to talk about the most basic aspect of survival—the space suit. When most of you imagine an astronaut, that's probably the first thing that comes to mind, right? Well, without space suits, it would not be possible for us to survive in space. For example, outer space is a vacuum—there's no gravity or air pressure; without protection, a body would explode. What's more, we'd cook in the sun or freeze in the shade with temperatures ranging from a toasty 300 degrees above to a cool 300 degrees below zero Fahrenheit. The space suit that NASA has developed is truly a marvel. This photo enlargement here is a life-size image of an actual space suit worn by astronauts on the last space shuttle mission. This part is the torso. It’s made of seven extremely durable layers. This thick insulation protects against temperature extremes and radiation. Next is what they call a "bladder" of oxygen that's an inflatable sac, filled with oxygen, to simulate atmospheric pressure. This bladder presses against the body with the same force as the Earth's atmosphere at sea level. The innermost layers provide liquid cooling and ventilation. Despite all the layers, the suit is flexible, allowing free movement so we can work. Another really sophisticated part of the space suit is the helmet. I brought one along to show you. Can I have a volunteer come and demonstrate?

  【生词摘录】

  1. videotape: v. to record a television programme, film etc on a videotape 把(电视节目、电影等)录在录像(磁)带上

  2. vacuum: n. [C]a space that is completely empty of all gas, especially one from which all the air has been taken away 真空

  3. shade: n. [U]slight darkness or shelter from the direct light of the sun made by something blocking it 荫,背阴处

  4. toasty: adj. AmE informal warm and comfortable 【美,非正式】暖烘烘的,温暖舒适的

  5. Fahrenheit: n. [U]a scale of temperature in which water freezes at 32°and boils at 212°华氏温度

  6. marvel: n. [C]something or someone surprisingly useful or skillful, that you like and admire very much 十分有用(灵巧)的物(人)

  7. enlargement: n. [C]a photograph that has been printed again in a larger size 放大的照片

  8. life-size: 又作life-sized,adj. a picture or model of something or someone that is life-size is the same size as they are in real life 与实物(真人)大小一样的

  9. shuttle: n. [C]a spacecraft that can fly into space and return to Earth, and can be used more than once (可以多次使用的)航天飞机,太空穿梭机

  10. mission: n. [C]an important job done by a member of the airforce, army etc, especially an attack on the enemy 任务,使命

  11. torso: n. [C]your body, not including your head, arms, or legs (头和四肢除外的)人体躯干

  12. durable: adj. staying in good condition for a long time even if used a lot 耐用的

  13. insulation: n. [U]material used to insulate something, especially a building (尤指建筑物的)绝缘材料;the act of insulating something or the state of being insulated 隔绝

  14. extreme: n. [C]something that goes beyond normal limits, so that it seems very unusual and unacceptable 极端

  15. bladder: n. [C]a bag of skin, leather, or rubber, for example inside a football, that can be filled with air or liquid (可充气或充水的)囊;袋

  16. inflatable: adj. an inflatable object has to be filled with air before you can use it 须充气方可使用的,(需)充气的

  17. sac: n. technical a part inside a plant or animal that is shaped like a bag and contains liquid or air 【术语】(动物或植物的)囊;液囊

  18. innermost: adj. formal furthest inside 【正式】最里面的

  19. ventilation: n. [U]通风(ventilate: v. to let fresh air into a room, building etc 使通风)

  20. helmet: n. [C]a strong hard hat worn for protection by soldiers, motorcycle riders, the police etc 头盔,钢盔,安全帽

  21. demonstrate: v. to show or prove something clearly 证明,论证,证实;to show or describe how something works or is done 示范,演示;to march through the streets with a large group of people in order to publicly protest about something (为公开抗议某事)游行,示威;to show that you have a particular skill, quality, or ability 展示,表露出(某种技能、品质或能力)

(责任编辑:许爽)

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