Where does this definition of ئىككىنچى ساناق سىستېمىسىدىكى سان come from?
This entry for ئىككىنچى ساناق سىستېمىسىدىكى سان is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.