The relative risk of severe visual loss for black patients vs nonblack patients was 3.5 in at least 1 eye and 4.8 in both eyes.是什么意思_The relative risk of severe visual loss for black patients vs nonblack patients was 3.5 in at least 1 eye and 4.8 in both eyes.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句