Where does this definition of three r's come from?
This entry for three r's is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is three r's a noun, verb, or something else?
In this entry, three r's is tagged as 2n..
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.