| 1. | The number of digit placeholders to the left determines the number of digits in the exponent
。左侧数字占位符的个数确定指数中数字的个数。 |
| 2. | You must also include digit placeholders to the right of this symbol to get correct formatting
还必须在该符号的右侧包含数字占位符，才能获得正确的格式设置。 |
| 3. | Standard use of the thousand separator is specified if the format contains a thousand separator surrounded by digit placeholders
如果格式中的千位分隔符包含在数字占位符（ |
| 4. | Digit placeholder , except that leading and trailing zeros aren t displayed if the number has fewer digits than there are
数字占位符的作用相似，不同的是当数字的位数少于格式表达式中小数点分隔符任一侧 |
| 5. | To display a leading zero displayed with fractional numbers , use zero as the first digit placeholder to the left of the decimal separator
若要显示与小数一起显示的前导零，请将零用作小数点分隔符左侧的第一个数字占位符。 |
| 6. | If the number has more digits than there are digit placeholders to the left of the decimal point , the extra digits are copied to the result string immediately before the first digit placeholder
如果数字位数多于小数点左边数字占位符的个数，多余的数字被复制到输出字符串中紧挨着第一个数字占位符的前面。 |
| 7. | Thousand separator specifier : if one or more , characters is specified between two digit placeholders 0 or that format the integral digits of a number , a group separator character is inserted between each number group in the integral part of the output
首先，如果格式字符串在小数点（如果有）左边的两个数字占位符（ 0或）之间包含“ , ”字符，则输出将在小数点分隔符左边的每三个数字之间插入千位分隔符。 |
