【Earth&Sky】火星上的化学物可能是生命所需的盐_英语听力练习mp3下载-自然-沪江听力酷

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【Earth&Sky】火星上的化学物可能是生命所需的盐

听力简介：

听写填空,只写填空内容,不抄全文,4个单词/词组+1个句子,不用写标号,注意标点~

Peter Smith: We built [---1---] missions that are kind of human-like — an arm, taste, sense of smell, touch. All of these sensors are very similar to human senses.

You're listening to Peter Smith, Principal Investigator of NASA's Phoenix Mars Mission. Phoenix is a robotic lander that probed Mars for signs of life in 2008, and found some possible evidence in the planet's soil.

Peter Smith: What we're seeing is an [---2---] of chemicals that on the Earth would be considered important for life.

Phoenix explored the northern polar region of Mars, and found traces of a salt there, called 'perchlorate'.

Peter Smith: Perchlorate is an energy source for life on the Earth. And we see a range of salts that we think of as [---3---]. You know, you get them in your mineral pill in the morning. And so these are the kind of systems that we would expect on the Earth would be [---4---].

Smith said the kinds of minerals found by Phoenix are typically created by liquid water. [---5---] More analysis and lab work here on Earth might determine whether — as recently as a few million years ago — Mars had a wet environment, friendly to life.

I'm Jorge Salazar from E&S, a clear voice for science. We are at E&S. org.

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