Figure 3: Performance TAB shows you a letter grade (a, b, c, d, f) and a percent grade (1-100).
图3:性能标签使用字母(A, B, C, D, F)表示等级以及当前等级(1 - 100)。
Enumerations and numeric ranges: For example, the value of a particular string attribute must be a, c, or D. Another example: the value of a particular numeric must be between 1 and 500.
枚举与数字范围:例如,某个特定字符串属性必须为A、c或者d。再比如,某个特定的数字必须在1至500之间。
The Romans had to keep on cooking up new letters every time their numbers got bigger - C for 100, D for 500, M for 1, 000 - because they didn't have zeros to add on to the end.
当数字增大时,罗马人只能疲于接招,不断地创造出新的字母用来标记数字 —— C代表100,D代表500,M代表1000 —— 因为在他们的数字系统中不能将‘0’添加在数字后面。 想感觉100万有多大?
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