And the reason for this, it turned out, after two or three years' work, was that in the skin we have huge stores not of nitric oxide, because nitric oxide is a gas, and it's released --  -- and in a few seconds it's away, but it can be turned into these forms of nitric oxide -- nitrate, NO3; nitrite, NO2; nitrosothiols.
そして２・３年の研究の結果 我々の皮膚には そのままではありませんが 一酸化窒素を大量に蓄える機能 があることがわかりました 一酸化窒素はガスで 数秒でなくなるので 窒素酸化物として蓄えます 硝酸塩  や亜硝酸塩  ニトロソチオールなど