It is better to trust to valour than to luck.
I returned to my room. There was a note under my door. It was from Bob. He said he was in the town looking for a job. He hadn't found anything yet. He added that he was sorry to have missed me.
When I returned to my room, I found a note from Bob under the door. He said he was in the town looking for a job, but hadn't found anything yet. He added that he was sorry to have missed me.
例1：Today, we use machines not only in industry but in other sectors of national economy as well.
Today machines are widely used not only in industry but in other sectors of national economy as well.
例2：Some people believe that it will be possible for automatic machines to replace completely in the future.
It is believed by some people that it will be possible for automatic machines to replace completely in the future.
例1：I shall go there unless it rains.
I shall go there if it doesn't rain.
例2：Their daily lives don't provide them with the exercise needed to keep them healthy.
Their daily lives fail to provide them with the exercise needed to keep them healthy.
例1：With a car, people can get around freely.
People can get around freely with a car.
例2：In fact, speaking is one of the most important means of communication.
Speaking is in fact one of the most important means of communication.
例1：A new type of TV sets was among the products on display.
Among the products on display was a new type of TV sets.
例2：We did not realize the problem of energy crisis until the end of last century.
Not until the end of last century did we realize the problem of energy crisis.
例1：Nowadays a lot of people work in office, spending most of their time indoors.
Nowadays a lot of people work in office and they spend most of their time indoors.
例2：There are many means of getting information and they enable us to keep up with what is going on in the world.
There are many means of getting information which enable us to keep up with what is going on in the world.
例3：Doonesbury cartoons satirize contemporary politics. The victims of political corruption pay no attention. They prefer to demand that newspapers not carry the strip.
Doonesbury cartoons laugh at contemporary politics, but the victims of political corruption pay no attention and prefer to demand that newspapers not carry the strip.
例4：The campus parking problem is getting worse. The university is not building any new garages.
The campus parking problem is getting worse because the university is not building any new garages.
Ignorance is the mother of impudence.——无知是鲁莽之源。
In the morning the dust hung like fog, and the sun was as red as ripe new blood. (明喻)
His daughter is the apple of his eyes. (暗喻)
An idea spoke within him, racing through his mind. (拟人)
His voice was loud enough to wake the dead. (夸张)
Many of us allow our children to eat junk, watch junk, listen to junk, talk junk, play with junk, and then we are surprised when they turn out to be social junkies. (排比)
Once a man is dead, there is no helping; you can't rekindle the spark of life in him.
本句中的there is no helping是汉语式的英语，不符合英语的习惯说法。这里虽然用了比喻，但更改了原来的主语，句子显得罗嗦、笨拙。如果改成下面的习惯表达，句子变得既简洁又生动。
Once a man is dead, he can't be brought back to life.
再如The committee refused to listen to our request.如果被改成The committee turned a deaf ear to our request.句子生动，增加了文采。