It can revise the following conditions: incorrect word, missing word and extra word. The parameters of the method were decided by experiments.
通过词语相似度计算可以修正用户提问中错字、漏字、多字等情况，并且通过实验给出了词语相似度计算中参数的参考值。
The double type can also be referred to as double precision, although it isn't clear why you would want to type the extra word every time you need a double-precision number.
double类型也可以表示为DOUBLE PRECISION，虽然为什么在需要双精度数字时要输入额外的单词，原因不明。
Such words are used to generate a CAPTCHA by combining them with a known word, skewing the image and adding extra lines to make the words harder to read.
这些词汇和另一个已知词汇组合，将图像扭曲，并加上一些多余的线增这些词的辨认难度，这样来产生一组验证码。
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