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During the acid wash step, chemical contact is usually sufficient.
在酸洗过程中，化学试剂的接触通常式充分的。
youdao
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In this step also the acid moiety was methylated to give the ester.
在这一步，也是酸基元是甲基给予酯。
youdao
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In this step also the acid moiety was methylated to give the ester.
在这一步，也是酸基元是甲基给予酯。
youdao