计算结果保留三位小数 calculate to three decimal places ; calculate e to three decimal places
保留至几位小数 round d to
在奇数除法中，它不会保留小数部分，这就是它可用于测试奇数的原因。
In an odd number division, it does not retain the decimal part; this is why it can be used to test for an odd number.
但是，对于最后一点我们有点疑问，因为有些百分率是小于1的，如果不保留小数位的话就会出现百分率为零的情况，烦请帮忙确认。
But we are still un-sure about the final point, given some of the percentages are lower than 1, rounding will cause some of the percentage to be zero. Can you please confirm this.
银饰品的质量，在书写时保留一位小数。
The mass of silver decoration reserves a decimal fraction while writing.
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