单语范例（未经PONS编辑处理）
Delete rust and stain remover consisted of oxalic acid (an anti-rust agent), citric acid (a chelating agent) and microcrystalline cellulose, a very soft abrasive.
en.wikipedia.org The fruits have an oxalic acid odor, which varies between plants from strong to mild, the taste also varies from very sour to mildly sweetish.
en.wikipedia.org Unripe mango is sour in taste because of the presence of oxalic, citric and malic acids.
en.wikipedia.org It should be noted, however, that oxalic acid is also present in more commonly consumed foods such as spinach, broccoli, brussel sprouts, grapefruit, chives, and rhubarb, among many others.
en.wikipedia.org The production and release of oxalic acid by mycorrhizal fungi explain their importance in maintaining and supplying phosphorus to plant.
en.wikipedia.org