Cats never fail to fascinate human beings. They can be friendly and affectionate towards humans, but they lead mysterious lives of their own as well. They never become submissive like dogs and horses. As a result, humans have learned to respect feline independence. Most cats remain suspicious of humans all their lives. One of the things that fascinates us most about cats is the popular belief that they have nine lives. Apparently, there is a good deal of truth in this idea. A cat's ability to survive falls is based on fact.
Recently the New York Animal Medical Center made a study of 132 cats over a period of five months. All these cats had one experience in common: they had fallen off high buildings, yet only eight of them died from shock or injuries. Of course, New York is the ideal place for such an interesting study, because there is no shortage of tall buildings. There are plenty of high-rise windowsills to fall from! One cat, Sabrina, fell 32 storeys, yet only suffered from a broken tooth. 'Cats behave like well-trained paratroopers.' a doctor said. It seems that the further cats fall, the less they are likely to injure themselves. In a long drop, they reach speeds of 60 miles an hour and more. At high speeds, falling cats have time to relax. They stretch out their legs like flying squirrels. This increases their air-resistance and reduces the shock of impact when they hit the ground.
never fail to ,双重否定意味肯定，运用双重否定结构加深句子的语义
If you ask for help in the polite way,you never fail to succeed.
If you receive requests like this,you'll never fail to accept.
1. never fail to,can't fail to,don't fail to,否定词＋fail to
2. 否定的形容词之前加以否定，unreasonable,not unreasonable
What he said is not unreasonable.
It is quite common(not unvommon) for us to make mistakes.
You can't obtain English without working hard.
He doesn't have any meal without meats.
There is no cat that doesn't like fish.
There is nothing that he can't do.
There is no rule that has no exception.
as a result
have learned to :学会了，习惯了
People have learned to expect that trains are punctual.
Children have learned to expect that their parents are very able.
be suspicious of sb:对什么表示怀疑，存有戒心
one of the things that fascinates us most,that引导定语从句
One of the things that fascinates us most about planes is the popular fact that they are safe and fast.
turth,不可数名词，a good deal of
It seems that...
a cat's ability to survive falls is based on fact
be based on: 基于事实基础之上
base sth on：把某事加强在什么基础之上
We base the theory on the fact.
The theory is based on fact.
make a study of sth:对什么作出研究
over a period of five months.
in common=the same.
fall off ：坠落，掉落
死于疾病：die of illness/disease/hunger/thirst.自然的死亡用of
死于非自然原因：die from shock/injures/wound ,用from
there is no shortage
Shortage of money led to the failure of the experiments.
A lot of people in the world are suffering from terrible disease.
behave like=act like
the further cats fall,the less
典型的the more...the more...句型，用定冠词the修饰形容词或副词的比较级
The harder you study English ,the better you can learn it.
The more you eat,the fatter you will be.
be likely to do:有可能如何，强调可能性
In cold winter,We are likely to catch a cold.
and more :甚至更多
at high speeds
endlessly fascinating 无穷的，特别吸引人的魅力
that the further cats fall,the less they are likely to injure themselves
Because they have got enought time to relax and this increases their air-resistance and reduces the shock of impact
that the further cats fall,the less they are likely to injure themselves >Structure
With some children,their pocket money goes a long way.
in the way that...以……方式
I love you in the waythat you love me.
We like modern art in the same way that we like beautiful...
It is said that...据说
It is announced that...据宣布
It is reported that...据报道
there is plenty of--->there are plenty of
most cats remain suspicious of humans all their lives
during our holiday;during the week
through the crowd穿过人群；through the door
Monday through Friday
throughout their lives贯穿始终
It would seem(that)...---apparently
The theory is supported by the fact.
The theory is based on the fact.
even so 注意上下文的语境
in spite of 只用了连接名词、动名词或代词
He is very tired,even so he keeps studing english hard.