Spelling question: ι vs. η vs. υ and ο vs. ω - Duolingo Forum Comments
2018年2月18日 - There are some rules but they do not explain everything. Spelling is historic and a result of phonetic phenomena that do not apply to Modern ...
更多資訊〈Spelling question: ι vs. η vs. υ and ο vs. ω - Duolingo Forum Comments〉