sudo pip install googletrans==3.1.0a0
sudo pip install gTTS
prepare mpg123
" pronunce the word on the cursor, type 'gsp'
nnoremap gsp :!gtts-cli <cword> \| mpg123.exe -q - <cr>
" pronunce the selected sentence
xnoremap gsp :!gtts-cli - \| mpg123.exe -q - <cr>
" \| : pipleline symbol, using escape character when using mapping commnad
" gtts-cli - : When read from pipleline, file name is "-"(dash) conventionally.
" mpg123 -q -: -q means "silently", - mean :read from stdin.
" <cr> : mean "Enter" key for key mapping command in vim.