There are several different stages when you learning a new language, as the example of English, Math and AI (English is the language of human beings, Math is the language of science, and AI is the language of the universe)
Stage 1: Vocabulary. English words, Math formulas, AI codes
Stage 2: English, reading and listening; Math, paper reading; AI, codes reading
stage 3: English, writing and speaking; Math, paper writing; AI, codes writing
