在大部分的编程语言中，包含了小数点的数字称之为浮点数，可以用它来表示数学中的实数。
In most programming languages, Numbers that include a decimal fraction are called floating-point Numbers, which are used to approximate real Numbers in mathematics.
我儿子在做数学题时经常出现粗心的错误，把小数点点错位。
My son often makes careless mathematics mistakes by pointing off the wrong figures.
1901年，意大利数学家马里奥·拉扎里尼对该理论进行了实验尝试，他一共掷出了3408根针，得出的π值为3.1415929…，这个数值准确到小数点后六位。
The theory was put to the test in 1901 by Mario Lazzarini, a mathematician who dropped 3408 needles to get a value of 3.1415929…, correct to the first six decimal places.
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