The leather disk had been soaked in a mild acid solution of lemon juice.

皮板由于柠檬汁酸性溶液的浸泡而浸透。

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The jar showed signs of corrosion and seemed to have once contained a mild acid, such as vinegar or wine.

这个陶罐有腐蚀的痕迹，并且疑似曾经盛放过弱酸类液体，如醋或酒。

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"I tell my patients to exfoliate weekly using a creamy exfoliator or a mild acid peel" says Dr. Ellen Marmur.

“我告诉我的接受治疗者，使用磨砂洗面奶或弱酸性去皮素来脱离角质层，每周一次，”艾伦马默博士说。

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Carbon dioxide, the most important greenhouse gas, is a mild acid.

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Mr Swinney noted, with only a mild degree of festive acid, that the extra money reduced the overall real-terms cut in Scotland's capital allocation from 33% to 26%.

BBC: A time for Christmas miracles

The result, though more mild than the original preparation, has enough acid to cut through the fatty butter.

WSJ: Ham and Pickled Ramp Tartines | Slow Food Fast