| 单词 | morse code |
| 释义 | > as lemmasMorse code Morse code n. a code devised by Morse for use with the electric telegraph, in which the letters are represented by combinations of long and short electrical signals represented audibly or visually, or by long and short flashes of light or (in writing) dashes and dots.The code was first used in conjunction with the Morse telegraph to send signals across land via a telegraph wire, esp. by railway companies in the United States. The code was slightly adapted in Europe for simplicity, so that all letters were represented by patterns of short and long signals of fixed duration (certain letters in the original code were represented by patterns of dots and spaces or of dashes of varying length). In this form it became widely used for sending messages to and from ships at sea, esp. by radiotelegraphy. During the 20th cent. the use of the code to send messages across land gradually died out as the use of teleprinters became widespread, and it was eventually used chiefly to send distress signals from ships (as the message ‘SOS’, easily transmitted in Morse code), but this use has now been largely abandoned, superseded by newer systems of radio communication, notably the Global Maritime Distress and Safety System.extracted from Morsen.3< as lemmas |
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