Roman numerals

基本解释

It is no surprise because the mapping from Arabic to Roman numerals, and back again, is what is mathematically known as one-to-one and onto.
這之所以是毫無疑問的，是因爲從阿拉伯數字映射到羅馬數字，然後再映射廻來，這在數學上稱爲是一對一的（one-to-one）和映成的（onto）關系。
The press history of Oxford University began a misprint: Mr. Rood forgot a Roman numeral X, which was mis-dated in Roman numerals as "1468".
牛津大學的出版史始於一個印刷錯誤：魯德印刷的書中的羅馬數字漏印了一個X，這樣出版年代就錯印成了 1468年。
If the element has a type attribute, use its value to figure out how the number of each list item should be formatted (Roman numerals, Arabic numerals, or alphabetic characters).
如果元素有 type 屬性，則用這個值來決定應該如何格式化每個列表項的數字（羅馬數字、阿拉伯數字或按字母次序的字符）。

Roman numerals appear to be an illogical hodgepodge to us, but they once efficiently complemented a counting board.
FORBES: Magazine Article
Roman numerals signal watch is to be worn with formal or business attire.
FORBES: The Face of Time