However, there is only a moderate correlation between the hydrogen ion concentration of a food and its perceived sourness due to the penetration of non-dissociated acids inside the taste cells.

然而，因为未分离酸渗透到味觉细胞中，饲料的氢离子浓度和它的酸味感觉之间仅仅有一个中度相关性。

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Transfer of non dissociated neutral molecule CuCN in solid-liquid system by phase transfer catalysts is investigated.

研究了相转移催化剂(PTC)在液固相体系中，转移萃取非解离型中性分子氰化亚铜的过租。

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New identities are usually reserved for officers under "non-official cover, " where they are generally assuming identities that are totally dissociated with the U.S. government.

WSJ: Russia Expels U.S. Diplomat