Translation of the Passive Voice
We are kept strong and well by clean air. 
Visitors are requested not to touch the exhibits.
The three machines can be controlled by a single operator. 
John was a lawyer’s son and was destined to the bar.
I. The Passive Voice Converted into the Active Voice
“Fortress Besieged” has been translated into many languages.
Diplomacy has / Diplomatic relations have been established between China and the USA.
The sense of inferiority that he acquired in his youth has never been totally eradicated.
The area will have to be protected from too frequent, or too intense, or too careless visiting.
The expansion of metals on heating must be taken into consideration before a long metal bri
dge is built.
Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.
Although the dreams of seeing and hearing things from far, far away was made by human beings several thousand years ago, such dreams came into reality in modern times.
In other words mineral substances which are found on earth must be extracted by digging, boring holes, artificial explosions, or similar operations which make them available to us.
In general, the tests work most effectively when the qualities to be measured can be most precisely defined and least effectively when what is to be measured or predicted can not be well defined.
★ Another middle school has been set up in our district．
A right kind of fuel is needed for an atomic reactor.              //            Modern scientists have discovered that energy may be created from matter and that matter, in turn, may be create
d from energy.
THE TIMES is read by the people who run the country; THE GARDIAN is read by the people who would like to run the country; THE FINANCIAL TIMES is read by the people who own the country and THE DAILY TELEGRAPH is read by the people who remember the country as it used to be.
It leads the discussion to extremes at the outset: it invites you to think that animals should be treated either with the consideration humans extend to other humans, or with no consideration at all.
And it is imagined by many that the operations of the common mind can be by no means compared with these processes, and that they have to be acquired by a sort of special training.
★ Better be envied than pitied.        //      It is suggested that meeting be put off till next Monday.
It could be argued that the radio performs this service as well, but on television everything is much more living, much more real.                      //              Television, it is often said, keeps one informed about current events, allows one to follow the latest developments in science and politics, and offers an endless series of programs which are both instructive and entertaining.
It is generally accepted that the experiences of the child in his first years largely determine his character and later personality.        //        During this transfer, traditional historical methods were augmented by additional methodologies designed to interpret the new forms of evidence in the historical study.
It is well known that smoking is harmful to the health.…   
II. The passive structure converted into a sentence without a subject
Methods are found to take these materials out of the rubbish and use them again.
Great efforts should be made to inform young people especially the dreadful consequences
of taking up the habit.        //        It should be made clear to entire citizens that whoever enjoys rights must undertake corresponding obligations.                     
To develop economy, different kinds of talented people should be organized. People of real ability should be especially promoted and given raise.            //            We both believe that through vigilance and strength, in your words, war can be postponed, and in our words, war can be avoided.
On the whole such a conclusion can be drawn with a certain degree of confidence, but only if the child can be assumed to have had the same attitude towards the test as the other with whom he is being compared, and only if he was not punished by lack of relevant information which they possessed. 
III. The passive structure remaining unchanged
Any time we would surely be spotted by enemy planes flying in and out of the airfield.
Early fires on the earth were certainly caused by nature, not by Man.
The dishes were all removed before I had finished eating.
Our future is built, bit by bit, minute by minute, by the actions of human beings.
The movement to oppose racial discrimination was personally initiated and led by a famous Negro leader.
reactor 翻译Those who support the “nature” side of the conflict believe that our personalities and behavior patterns are largely determined by biological factors.

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