|
A. courage B. increase C. effects D. attention E. extent F. unknown G. strong H. find I. practical J. trouble K. including |
The desire to make explorations（探险）is born with man. Wherever his imagination goes, man also has a wish to go. A large part of human history is connected with the exploration of the world in which we live. Again and again people have set out with surprising and patience to look into regions and lands to see what had not yet been seen, to make known the unknown. With kites, balloons and aircraft they left the ground to pass through the lower atmosphere. Now the outer space receives their .
Why should man take the of conquering（征服） space? It is hard to list the specific practical benefits that will result. But one knows, from past experience in other areas, that man will surely see and discover new things in space that will our scientific knowledge, and this new knowledge will its way into valuable practical uses. What we learn about man himself, from his experience in space, and from the of space and the space flight environment on him, will be very valuable. The new techniques developed to carry out the exploration of space, and to keep man alive in space, will certainly find uses in everyday life in some way. Many areas will benefit from them, communication, generation of power, transportation and travel, food production, materials, fuels and many others. But to say definitely just what the practical results will be is almost impossible.
