按键盘上方向键 ← 或 → 可快速上下翻页，按键盘上的 Enter 键可回到本书目录页，按键盘上方向键 ↑ 可回到本页顶部！
————未阅读完？加入书签已便下次继续阅读！
（3） turn out to be为固定短语，常与to； that连用，表示结果。
Things turned out to be exactly as the professor had foreseen。事情正如教授所预见的那样。
6。Captain Nemo takes them on a voyage across the oceans。尼莫船长带着他们横跨大洋航行。
voyage名词，表示“航行，旅行”。我们以前学过的表示旅行的词主要有：journey、trip、tour、voyage，它们各自的侧重点不同。
7。All that is needed for life on board comes from the ocean。 船上的一切生活所需全来自海洋。
on board表示“在船上，在公共交通工具内”之意。
We went on board the ship。 我们登上了轮船。
8。dressed in diving suits； they walk around in this magic world； lighted by the lamps of the ship。 身着潜水衣，他们在船灯光照耀下的魔幻般的世界里四处走动。
（1） dressed in diving suits=They were dressed in diving suits；整个句子的主语为they，跟dress的主语一致并构成被动关系，故可省略，只保留过去分词做状语。
（2） lighted by the lamps of the ship相当于一个非限定性性定语从句 which was lighted by lamps of the ship。 句中的by为副词，为“用，借助”之意。
Though it is dark； the farmers are still working in the field by the light of their tractors。
尽管天黑了，农民们还在借着他们拖拉机的亮光继续劳动。
9。You could say he is someone you will neither like nor dislike。 你也许会说，你既不喜欢他也不讨厌他。
（1） could为情态动词，并非为can的过去式。它表示可能性，意为“能，可能，可以”。
If I could go with you； I should feel very glad。假如我能同你们一起去，我会感到非常高兴。
You could have been more considerate。你本来可以更慎重些。
（2） dislike=do not like，为及物动词，表示“不喜欢，厌恶”之意。后常跟名词或动名词形式。
He likes cats but dislikes dogs。 他喜欢猫但不喜欢狗。
She strongly disliked being spoken to like that。她很不喜欢别人对她这样说话。
dislike也可用作名词，表示“不喜欢；厌恶”。
I felt a strong dislike of the new teacher。我感到很不喜欢这个新教员。
I have taken a strong dislike of him。 我极不喜欢他。
10。Another wonderful story is that of Journey to the Center of the Earth。
《地心之旅》是他的另一个优秀的故事。
that在句中为代词，代指 the story。英语中有时为避免重复常用one或that来代指前面提到过的人或物。one为泛指想当于a＋sth。，有时前面有the或某些形容词修饰；that相当于the one，一般表示特指。
I don’t like the red coat； I like the yellow one。 我不喜欢那件红的，我喜欢那件黄色的大衣。
A bridge made of stone is always stronger than one made of wood。=A bridge made of stone is always stronger than a bridge made of wood。
The bridge stone made of is always stronger than that made of wood。=The bridge made of stone is always stronger than the bridge made of wood。 石头建造的桥一般比木头建造的桥结实。
UNIT 13 The water planetTHE PROPERTIES OF WATER 水的性质
Earth is an ocean planet。 About three billion years ago； life on our planet began in the deep blue seas。 99％ percent of the living space on earth is in the oceans。 Marine life is incredibly rich and varied。 There are about five million species in the oceans and we have yet to learn much about them。 Life in the oceans ranges from the tiniest plants all the way up to giants like sharks and whales。 What is it that makes the ocean such a great place to live？ The answer is water。
地球是个水球。大约三十亿年前，地球上的生命从海洋深处诞生了。地球上大约99％的生存空间都在海洋里。海洋生物的丰富和多样性超乎想象。海洋里有五百多万种生物，其中很多还需要我们去加以了解。海洋里的生物从微小的浮游生物到庞大的动物如鲨鱼和鲸鱼都有。到底是什么使得海洋成为这么好的生活环境？答案便是水。
CHEMICAL STRUCTURE 水的化学结构
The chemical structure of water makes it an excellent medium for life。 Water is actually quite simple； but the way the water molecule is formed gives water its unique properties。 The water molecule is made up of two hydrogen atoms and one oxygen atom。 The two hydrogen atoms form a polar molecule； that is； one with a slightly positive end and one with a slightly negative end。 The chemical structure of water also makes it different from almost everything else on earth。 Water is a liquid at room temperature and has a relatively high freezing point。 Because water is polar； it can break down or dissolve both solids and gases。 The nutrients in whatever falls into the ocean will quickly become available to other living creatures。
水的化学结构使得它成为生命存在的奇妙的载体。水的构成实际上很简单，但是水分子的构成方式使得水具有独特的性质。
水分子是由两个氢原子和一个氧原子构成的。
两个氢原子组成了一极，也就是说，水分子的一端弱微呈阳性，另一端弱微成阴性。水分子的这种结构使得它成为地球上独一无二的东西。在室温下；水呈液态，并且有相对较高的结冰点。因为水具有两极性，水无论是呈固体还是气体都可以分离（分解）。流入海洋里的任何营养物都会马上被其他的生物吸收。
SALINITY 水的盐度
When dissolved gases and solids mix with pure water； the result is sea water； or salt water。 The salinity of the earth’s oceans is about 35 parts per thousand； meaning that there are about thirty…five grams of dissolved solids and gases in one kilo of water。 Even though the pure water is what gives sea water its main properties； the salinity of sea water affects both its weight and freezing point。 Salt water has a lower freezing point and is heavier than pure water。
当分解后的气体和固体和纯水混合后，水就成了海水或盐水。地球海洋的盐度是千分之三十五，也就是说大约一千克的水中就会有35克的已容固体或气体。即使纯水使海水具有了水的主要性质，但海水的盐分也会影响它的比重和冰点。盐水的结冰点较低，比重也比淡水大。
DENSITY 密度
Density is the relationship between mass and volume and is measured in kilos per cubic meter （kg/m3）。 The density of pure water is 1；000kg/m3； meaning that one cubic meter of water weighs one thousand kilogram。 If a substance has a higher density； say 5；000kg/m3； it will not float on water。 Marine animals and plants take advantage of the density of water。 With the right kinds of body； it is possible to heat around in the ocean and let the water do the work。 When water freezes； its density decreases。 If it didn’t； the oceans would be frozen solid。
密度是质量和体积之间的关系，通常用每千克/立方为测量标准。纯净水的密度为1000kg/m3；也就是一立方米水的重量为一千公斤。如果某种物质的密度比较大，比如说为5000kg/m3，它就不会漂浮在水上。海生动植物利用了海水的密度。由于生物有合适的体型，它们能够自由地漂浮在海洋之中，海水能帮助它们。当水结冰时，它的密度会降低。如果不是这样的话，海洋就会凝固成固体。
HEAT CAPACITY 水的热容量
Heat capacity is the amount of energy it takes to raise the temperature of a substance one degree centigrade。 The heat capacity of water is relatively high。 Water can absorb and give off a lot of heat without big changes in its temperature； thus creating a stable environment。 Most animals and plants are sensitive to large or sudden changes in temperature； so the ocean is a safe and comfortable habitat。 The water in the oceans also keeps the temperature of the earth steady by absorbing and releasing heat。
热容量是一种物质升高一摄氏度所需要的能量。水的热容量相对来说较高。
水能在自身温度不会发生很大变化的情况下吸收和�