Most bacteria grow best in slightly acid medium.

多数细菌在微酸性的介质中生长最好。

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In organic acid medium the adsorption was more complex.

在有机酸介质中，吸附作用比较复杂。

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The ferrous oxalate with crystal water was prepared with ferrous ammonium sulfate and oxalic acid in acid medium.

采用硫酸亚铁铵和草酸溶液在酸性介质条件下合成含有结晶水的草酸亚铁。

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The most commonly used lemon-flavor molecule, citral, fades within 30 days when put in an acid medium like lemonade.

FORBES: Life