An outstanding statesman once said

An outstanding statesman once said in his speech, “There can be little doubt that in many ways the story of bridge-building is the story of civilization. By it we can readily measure an important part of a people’s progress.” Great rivers are important means of communication, for in many parts of the world they have been, and still are, the chief roads. But they are also barriers to communication, and people have always been concerned with finding ways to cross them.
For hundreds of years men have built bridges over fast-flowing rivers or deep and rocky canyons. Early man probably got the idea of a bridge from a tree f1len across a stream. From this at a later stage, a bridge on a very simple bracket or cantilever principle was evolved. Timber beams were embedded into the banks on each side of the river with their ends extending over the water. These made simple supports for a central beam reaching across from one bracket to the other. Bridges of this type are still used in Japan, and in India. A simple bridge on the suspension principle2 was made by early man by means of ropes, and is still used in countries such as Tibet. Two parallel ropes suspended from rocks or trees on each bank of the river, with a platform of woven mats laid across them, made a secure crossing. Further ropes as handrails3 were added. When the Spaniards reached South America, they found that the Incas of Peru used suspension bridges made of six strong cables, four of which supported a platform and two served as rails.
All these bridges made possible crossings only over narrow rivers. The type of temporary floating bridge, the pontoon bridge, has been used for military purposes; military engineers can construct a temporary bridge on this principle, able to carry all the heavy equipment of a modern army, in an extremely short time.
The idea of driving wooden piles into the bed of the river in order to support a platform was put into practice 3,500 years ago. This is the basis of the ‘trestle’ or pile bridge5 which makes it possible to build a wider crossing easier for the transport of animals and goods.

Результаты (английский) 3:

an outstanding statesman once said in his speech, "there can be little doubt that in many ways the story of bridge building is the story of students. by it we can philology measure an important part of a people's progress. "great rivers are important means of communication, for in many parts of the world they have been, and still are, the chief roads. but they are also barriers to communication, and people have always been concerned with finding ways to cross them.for hundreds of years men have built bridges over fast - flowing rivers or deep and rocky canyons. early man probably got the idea of a bridge from a tree f1len across a stream. from this at a later stage, a bridge on a very simple bracket or cantilever principle was through. timber beams were embedded into the banks on each side of the river with their ends having over the water. these made simple supports for a central beam reaching across from one view to the other. bridges of this type are still used in japan, and in india. a simple bridge on the motor principle2 was made by early man by means of ropes, and is still used in countries such as Tibet. two parallel ropes suspended from rocks or trees on each bank of the river, with a platform of woven mats laid across them, made a secure crossing. further ropes as handrails3 were added. when the Spaniards reached south america, they found that the Incas of peru used motor bridges made of six strong cables, four of which supported a platform and two served as rails.all these bridges made possible crossings only over narrow rivers. the type of temporary floating bridge, the pontoon bridge, has been used for military purposes, military engineers can construct a temporary bridge on this principle, able to carry all the heavy equipment of a modern army, in an extremely short time.the idea of all that piles into the bed of the river in order to support a platform was put into practice for 3500 years ago. this is the basis of the 'trestle' or pile bridge5 which makes it possible to build a wider crossing easier for the transport of animals and goods.