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Transforming Mars
改造火星
Read about the ultimate travel experience in this article from a scientific journal.
讀這篇摘自科學(xué)雜刊上有關(guān)最終旅行經(jīng)歷的文章。
Ever since the beginning of history, people have dreamt of interplanetary travel.
人類有史以來一直夢(mèng)想著星際旅行。
For centuries, these dreams have always remained dreams.
數(shù)世紀(jì)以來，這些夢(mèng)想一直還只是夢(mèng)想。
However, scientists now want to make these dreams come true.
然而，現(xiàn)在科學(xué)家們想使這些夢(mèng)想成為現(xiàn)實(shí)。
They are planning to transform Mars so that humans can live there.
他們計(jì)劃改造火星，那樣人類就能在那里生活。
Within 30 years, the first people will land on Mars and, by the year 2185, we will have established cities.
在三十年內(nèi)，第一批人類將登上火星，到2185年，我們將在那里建成多個(gè)城市。
In many ways, Mars is the planet most similar to Earth.
在很多方面，火星是與地球非常相似的一顆行星。
A Martian day lasts about 24 1/2 hours (although a year has 687 days).
火星上的一天大約有24個(gè)半小時(shí)（雖然一年有687天）。
While there is no water, there is a lot of ice in the two polar ice caps.
雖然沒有水，但是兩極冰冠里有很多冰。
The average temperature is -60℃.
平均氣溫是零下60攝氏度。
The plan involves changing Mars so that it becomes more like Earth.
該計(jì)劃是改造火星，從而使它更像地球。
This means using the 'greenhouse effect' (which we are trying to stop on Earth).
這意味著利用溫室效應(yīng)（我們正努力在地球遏制溫室效應(yīng)）。
The suggested programme would have five main stages.
這個(gè)被提出的項(xiàng)目包括五個(gè)主要階段。
Stage 1 (AD 2030-2045)
第一階段（公元2030年－2045年）
The first expedition arrives on Mars, after a journey by spacecraft of about six months.
經(jīng)過6個(gè)月的太空飛行之后，太空船登陸火星進(jìn)行第一次探險(xiǎn)。
The members construct underground buildings, conduct experiments, look for good sites for future landings, and also check for signs of life.
宇航員建造地下建筑物，進(jìn)行實(shí)驗(yàn)，尋找未來適合的著陸點(diǎn)，并探詢生命的蹤跡。
They can survive only as long as they wear spacesuits, because 95 percent of the atmosphere is carbon dioxide.
他們只有穿著太空服才能生存，因?yàn)榘俜种攀宓目諝馐嵌趸肌?/div>
Nonetheless, the low gravity (one-third of Earth's) means they can move around easily.
但是，重力小（相當(dāng)于地球的三分之一）意味著他們可以輕易地到處走動(dòng)。
