【正文】 kers make up only a small section of the .
every one can be different from another. why must we all be the same?
每個人都可以和別人不一樣。為什么非要人人都一樣？
25. although its origin may still be a puzzle, the moon can never be anything more than a satellite of the earth. 雖然它的起源仍然是個謎，但是月球就是地球的一個衛(wèi)星。
it’s a puzzle where all my money goes each week. 我每星期的錢都到哪兒去了是一個難解的問題。 this letter puzzles 。
i’m puzzled about what to do ,我心里還沒數(shù)哩。
26. find ways to solve the problem of global warming. 找到解決全球變暖這個難題的方法
27. die out滅絕, 逐漸消失, 漸漸止息
some animals will die out if we don’t protect them. 好多動物會滅絕假如我們再不去保護他們。
28. as a result of this event, a great dust cloud formed in the sky blocking out the sunlight.
由于這件事，在天空中形成一大團塵埃遮住了陽光。
that wall blocks out all the 。
29. however, whether the climate will change again is a concern for everybody on earth.
但是，氣候是否會再變是世上每個人關切的事。
she showed great concern about you. 她很為你擔心。
have a concern in和...有利害關系have no concern for毫不關心
30. …a et crashed into the earth long ago… ……很久以前，一顆彗星撞擊了地球，……
she noticed a car crash into a big tree 。
31. …i was lucky enough to have a chance to make a trip into space………有幸得到一個機會去太空旅行…… they know well enough what we mean. 他們當然懂得我們的意思。
32. …explained to me that the force of gravity would change three times on our journey and that the first change would be the most powerful.
…向我解釋說，在我們的航行中會有三次引力的改變，而第一次的改變將是最強的。
please explain to me where to begin and how to do 。
he explained how the machine was 。
33. as the rocket rose into the air, we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity. 隨著火箭徐徐升空，因為我們要盡力逃離地球的吸引力，所以我們被向后推在座位上。 escape danger脫險escape one’s memory被某人遺忘
his name escapes me. (=his name escapes my memory.) 我記不得他的名字了。
he narrowly escaped death. 他九死一生。
the hotel guests tried their best to escape from the burning building. 旅客們盡力從燃燒的大樓中逃出來。
34. on the earth if i fall from the tree i will fall to the ground.
在地球上如果我們從樹上掉下來，總會朝地上落下去的。
35. when we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth’s. 當我們更接近月球時，就會感到月球的引力在拉我們，但是月球的引力不像地球的引力那么大。
36. i cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth bee smaller and the moon larger. 我離開高興起來，由于失重我在太空艙里飄來飄去，望著地球越來越小，月亮越來越大。
37. but when i tried to step forward, i found i was carried twice as far as on the earth and fell over. 但是當我努力向前邁步的時候，我發(fā)覺我被送出去很遠，步子的跨度竟是地球上的兩倍。
英語倍數(shù)表達法：
（一般限于包括基數(shù)在內三倍或三倍以上的數(shù)。表示兩倍的數(shù)，一般用twice） 其句型有：
1）...times+形容詞（副詞）比較級+than...。如：
this hall is five times bigger than our classroom.這個大廳比我們的教室大五倍。（是我們教室的六倍大）
2）...times +as+形容詞（或much）或副詞原級+as...。如：
the big box is four times as heavy as the small one.大箱子是小箱子的四倍重。
3）...times +the+名詞（size, height, weight, length, width）+of。如：
this big tree is four times the height of that small one.這棵大樹的高度是那棵小樹的四倍。（比那棵小樹高三倍）
4）...times+more+名詞（可數(shù)，不可數(shù)）+than...。如：
there are four times more books in our library than in yours.
我們圖書館藏書（數(shù)量）是你們圖書館的四倍。（多三倍）
5）...times +as many（或much）+名詞+其他。如：
there are three times as many apples in this basket as in that one.這個籃里的蘋果是那個籃里的三倍。 there are five times as many students as we expected.這里的學生是我們預計的五倍。
6）...times +over+被比對象，表示“增加……倍”。如：
the grain output in that village was twice over that of 1978.那個村的糧食產量比1978年的增加了兩倍。
7）...times +that of+被比較的對象表示“是……倍”。如：
in this workshop, the output of july was times that of january.。
。
1）double作形容詞，表示“兩倍的”。如：
the production is now double what it was ten years ago.現(xiàn)在的產量是十年前的兩倍。
2）double作動詞，意為“是……的兩倍”。如：
the output has been doubled in the past five years.過去五年中產量翻了一番。
38. walking does need a bit of practice now that gravity has changed. 既然重力改變了走路確實需要練一練了。
39. after a while i got the hang of it and we began to enjoy ourselves.
過了一會兒，我才掌握了走路的訣竅，這才開始感到自入了。
40. we watched, amazed as fire broke out on the outside of the spaceship as the earth’s gravity increased. 我們驚奇地看著，隨著地球引力的增加，宇宙飛船的外層燃燒起火。
break out可指大火、戰(zhàn)爭等突然爆發(fā)。
world war ⅱ broke out in 。
break out還可指突然發(fā)出某種聲音。
she broke out in curses in her 。
41. there is very little gravity so that things float 。
42. watch out for… 戒備，提放，密切注意
43. astronomy is a scientific subject made up of mathematics and physics.
天文學是數(shù)學和物理構成的科學科目。
44. you can use the scientific method when studying english too. 學習英語的時候你也可以運用科學方法。此資料由網(wǎng)絡收集而來，如有侵權請告知上傳者立即刪除。資料共分享，我們負責傳遞知識