"Nitre," I replied. "How long have you had that cough?"

“硝，”我答道，“你害上那种咳嗽有多久了？”

youdao

"Nitre," I replied. "How long have you had that cough?"

“硝，”我答道，“你害上那种咳嗽有多久了？”

youdao