METHODS: The content of nitrite/nitrate (NO 2-/NO 3-) in out-flowing pulmonary blood (OPB) was assayed by nitric acid reduction method.是什么意思_METHODS: The content of nitrite/nitrate (NO 2-/NO 3-) in out-flowing pulmonary blood (OPB) was assayed by nitric acid reduction method.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句