First of all, the number of words in the paper duplicate checking system is usually presented in the form of characters, while the number of words in Word is calculated in the form of words. Because there are some differences between words, the calculation results will be different when the number of words is considered at the same time.

Secondly, some special characters, such as punctuation, spaces and so on. , which is usually considered as the word count system of papers. Word's word count usually doesn't consider these special characters. This difference will also lead to the difference between the number of words in the system and the number of words in Word.

In addition, the number of words in the paper duplicate checking system may also be affected by the system algorithm. Different systems may use different algorithms to calculate the number of words, resulting in inconsistent results.

To sum up, the number of words in the paper duplicate checking system is different from that in Word. In order to obtain accurate results, researchers need to consider the system algorithm, the differences between words, the calculation of special characters and other factors when using the paper duplicate checking system for word count. By further studying and improving the system algorithm, the accuracy and reliability of the paper duplicate checking system can be improved, so as to better meet the needs of academic circles.