求翻译：1988.5.10发行 毛泽东侧面头像固定水印1992.8.20开始发行1990年版，该版在钞纸中增加了一条固定的金属安全线，并增加了用无色荧光油墨印制的表示面额的汉语拼音和阿拉伯数字字样。正面是四大伟人头像，浮雕系司徒兆光先生创作，中央美院侯一民教授绘画，雕刻家苏席华精心雕刻大人民币凹版，十分精美。币背是井冈山主峰图。它位于湘赣两省边境，属井冈山市，在罗宵山脉之中段，方圆275公里，有大小峰峦500多座，最高山峰海拔1841米。井冈山集自然风光和革命胜地于一体，有奇峰异石，流泉飞瀑，浮云薄雾，高山田园，更有很多革命胜迹，形成了独特的旅游胜地景观。是什么意思？

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Mao Zedong's 988.5 .10 release 992.8 side avatar fixed watermark .20 release 1990 edition, the version of the banknote paper has been added in a fixed metal safety line, and an increase of a colorless fluorescent inks that the amount of the Arabic numerals and Chinese pinyin words. Who is David fron

1988.5.10 release 1992.8.20 portrait of Mao Zedong's side fixed watermark began release in 1990, the banknote paper increased in a fixed metal security thread, and colorless fluorescent printing ink for increased value of Hanyu Pinyin and Arabic words. Positive is the portrait of four great men, cre