英语高手 求翻译

Television is one of today’s most powerful and widespread means of mass communication. It directly influences our lives on both a short-term and long-term basis; it brings worldwide situations into our homes; it affords a lot of opportunities for acquiring higher education ;and it performs these tasks in a convenient yet effective manner. We are all aware of the popularly accepted applications of television ,particularly those relative to entertainment and news broadcasting. Television, however, has also been a vital link in unmanned deep space exploration , in providing visions from risks areas (such as approach to radioactive materials or environments) in underwater research, in viewing storms moving across a big city area (the camera being placed in a weather-protective enclosure near the top of a tower), etc. The earth’s weather satellites also use television cameras for viewing cloud cover and movements from 20,000 miles in space. Infrared filters(红外线滤色镜） are used for night views, and several systems include a spinningmirror arrangement to permit wide-area viewsfrom the camera. Realizing the unlimited applications for today’s television, one may thus logically ponder the true benefits of confining most of our video activities to the mass-entertainment field.ӠTraditional television broadcasting within the United States centres around free enterprise ownership.This requires funding by commercial sponsors, and thus functions in an income-producing business manner. Television in USSR-subjected(前苏联控制的） areas, conversely, is a governmemt-owned and government-maintained arrangement. While such arrangements reject the need for commercial sponsorship,it also has the possibility of limiting the type of programs available to viewers.ӠA highly changed form of television called Slow-Scan TV is presently being usedby many Amateur Radio operators to provide direct visual communications with almost any area of the world .This unique visual mode recently allowed people on the tiny South Pacific country of Pitcairn Island to view, for the first time in their lives, distant areas and people of the world . The chief radio Amateur andcommunications officer of Pitcairn, incidentally, is the legendary Tom Christian---great, great grandson of Tom Christian of “Mutiny on the Bounty”（《叛舰喋血案》） fame. RadioAmateurs in many lands worked together for several months establishing visual capabilities for Pitcairners. The results have proven satisfactory, yet the visualcapabilities have only been used for health education, or welfare purposes. Commercial TV is still unknown to natives of that tiny country.Many other forms of television and visual communication have also been used on a semi-restricted basis. This indicates the many unused areas of video and television may soon be developed on a more widespread basis.