2024年12月英语四级听力真题 卷二 文章1

Passage One

文章1

Lift-off is usually the most environmentally harmful stage of any space mission, with vast quantities of fuel burnt up in a matter of minutes.

发射升空通常是任何太空任务中最环境危害最大的阶段，数分钟内燃烧掉大量的燃料。

For instance, SpaceX's Falcon 9 gets through 112 tonnes of refined fuel, emitting about 336 tonnes of CO2;. This is the equivalent produced by your average car driving almost 70 times around the world.

例如，SpaceX的猎鹰9号消耗了112吨精炼燃料，排放了大约336吨的二氧化碳。这相当于一辆普通汽车绕地球行驶近70次所产生的排放量。

As well as greenhouse gases, rocket engines emit particles that destroy ozone.

除了温室气体，火箭发动机还会排放破坏臭氧层的颗粒物。

These issues are growing more pressing with the emergence of commercial spaceflight.

随着商业太空飞行的出现，这些问题变得越来越紧迫。

There were 114 space launches in 2020, but there may be up to 1,000 per year in future.

2020年有114次太空发射，但未来每年可能多达1000次。

Sustainable fuels are the top priority to enable greener space travel.

可持续燃料是实现更绿色太空旅行的首要任务。

Current spacecraft use a variety of fuels, but most are based on fossil fuels.

目前的宇宙飞船使用各种燃料，但大多数都是基于化石燃料。

One potentially greener option is liquid hydrogen and oxygen.

一种潜在的更环保的选择是液态氢和液态氧。

Hydrogen can be obtained sustainably by using solar power to break water down into oxygen and hydrogen.

通过使用太阳能将水分解成氧气和氢气，可以持续地获得氢气。

Reusable rockets can cut down on some of the waste associated with spaceflight.

可重复使用的火箭可以减少与太空飞行相关的部分废物。

Traditionally, boosters, fuel tanks and other components are treated as expendable.

传统上，助推器、燃料箱和其他组件被视为一次性使用。

But guiding them back to Earth in a controlled manner opens new possibilities-most components from the Falcon 9 can be reused up to 100 times.

但是，将它们以受控的方式引导返回地球，开启了新的可能性——猎鹰9号的大部分组件可以重复使用多达100次。

Truly environmentally friendly space travel is still some way off.

真正环保的太空旅行仍然遥不可及。

But we already have many of the technologies needed to start limiting its impact on our planet.

但我们已经拥有了许多开始限制其对地球影响所需的技术。

Questions 16 to 18 are based on the passage you have just heard.

问题16到18是基于你刚刚听到的段落。

Question16. What do we learn from the passage about the lift-off of spacecraft?

问题16. 从段落中我们了解到关于宇宙飞船发射的什么？

Question17. What happens traditionally to boosters, fuel tanks and other components in spaceflight?

问题17. 在太空飞行中，传统上助推器、燃料箱和其他组件会发生什么？

Question18. What does the passage say we already have regarding spaceflight?

问题18. 段落中说我们已经拥有了关于太空飞行的什么？

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