醋含有醋酸，所以尝起来很酸。

Vinegar contains acetic ___acid, which makes it taste sour.

那个派对上有传言说有人偷偷带了酸性物质。

There were rumors that someone secretly brought ___acids to that party.

他的尖酸评价让整个团队士气低落。

His ___acid comments demoralized the entire team.