Letteri莱泰里lettern.信；字母v.写下；印刷n.租赁人letter extracting信函剔除letter of support佐证书letters and calls信访letter of request[经] 请求信letter of the law法律的条文letter of apology悔过书letters of patent[法] 专利特许证letter of inquiry询价函件letter post items函件lettering templet写字模形板

1. After it opens, pressing the appropriate letter key executes the function.
   助记符模式打开以后，按下适当的字母键就可以执行相应的功能。
2. To compact data by combining parts of the data, for example, to transform a two-word alphabetic key into a one-word numeric key by adding the numeric equivalents of the letters.
   通过将数据的某些部分进行组合来压缩数据，例如，通过将一些字母的数字等值相加，可把两个字长的字母键词变换为一个字长的数字键词。