The science of the stars

科學(xué)家透露：宇宙可能有兩個
我們的宇宙和一個"隱藏的"宇宙共同"鑲嵌"在"五維空間"中。在我們的宇宙早期，這兩個宇宙發(fā)生了一次相撞事故，相撞產(chǎn)生的能量生成了我們宇宙中的物質(zhì)和能量。 　　 　　
2. t alking and sharing
do you know how the universe began?
i n the 1920s in california, astronomer edwin hubble observed distant galaxies using an extremely powerful telescope. he made two mind-boggling (unbelievable) discoveries.
first, hubble figured out that the milky way isn’t the only galaxy. he realized that faint, cloud-like objects in the night sky are actually other galaxies far, far away. the milky way is just one of billions of galaxies.
second, hubble discovered that the g alaxies are constantly moving away from each other. in other words, the universe is expanding. the biggest thing that we know about is getting bigger all the time.
a few years later, belgian astronomer georges lemaître used hubble‘s amazing discoveries to suggest an  answer to a big astronomy question: “how did the universe begin?”
3.listening and reading aloud
now please listen to the recording and then read the text aloud. pay attention to how the native speaker is reading along and where the pauses are within each sentence. i will play the tape twice and you shall read aloud twice, too.
4. reading and underlining
next you are to read and underline all the useful expressions or collocations in the passage. copy them into your notebook after class as homework.
collocations from how life began on the earth
a cloud of energetic dust（具有能量的塵埃）, combine into…（合成……）, move around the sun（環(huán)繞太陽運轉(zhuǎn)）, become violent（變得激烈）, the solid surface（固體表面）, explode loudly（猛烈爆炸）, in time（及時，最終）, produce the water vapor（產(chǎn)生水蒸汽）, make the earth’s atmosphere（構(gòu)成了地球的大氣層）, cool down（冷卻）, on the surface（在表面）, be different from…（與……不同）, go round the sun（環(huán)繞太陽運轉(zhuǎn)）, disappear from…（從……消失）, stay on…（存留在……）, show one’s quality（顯現(xiàn)某人的特性）, dissolve harmful gases（分解，溶解有害氣體）, become part of…（變成……的一部分）, develop life（發(fā)展生命）, grow in the water（在水里生長）, fill… with…（用……來填充……，充滿了……）, encourage the development of…（鼓勵……的發(fā)展）, millions of years later（幾萬年以后）, live on land（在陸地上生活）, live in the sea（在海里生存）, grow into forests（長成森林）, produce young（生出幼仔）, lay eggs（下蛋）, animals with hands and feet（長著手腳的動物）, spread all over the earth（遍布全世界）, develop new methods（發(fā)展了新的方法）, grow food（種植）, move around（遷徙）, go by（過去，推移）, take care of…（在意……，照看好……）, put…into…（把……帶入，放入……）, prevent…from…（防止……做……）, escape from… into…（從……逃離到……）, become hot（變熱）, depen d on….（依靠，依賴，取決與…… ）, solve a problem（解決一個問題）