“phase-alternation line system”的概念、定义、翻译、参考文献-科学参考

单词	phase-alternation line system
释义	phase-alternation line system [`fāz ´ȯl·tǝr¦nā·shǝn ´līn ´sis·tǝm] ^{COMMUNICATIONS} A color television system used in Europe, in which the phase of the color subcarrier is changed from scanning line to scanning line, requiring transmission of a line switching signal as well as a color burst. Abbreviated PAL system.
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