柠檬汁含有柠檬酸，所以尝起来很酸。

Lemon juice contains citric ___acid, which makes it taste sour.

这种苹果汁有点酸，可能放太久了。

The apple juice has a slightly ___acidic taste, maybe it's been sitting too long.

他们在派对上尝试了迷幻药，结果开始看到各种奇怪的幻觉。

They tried ___acid at the party and started seeing weird hallucinations.

他的刻薄评论让整个会议气氛变得紧张。

His ___acid comments made the whole meeting atmosphere tense.