A lemon is an acid fruit.

柠檬是一种酸味水果。

youdao

The acid has burnt a hole in my jacket.

这种酸把我的上衣烧了一个窟窿。

《新英汉大辞典》

The acid test of a good driver is whether he or she remains calm in an emergency.

在紧急情况下能否保持冷静是对一个好司机的严峻考验。

《牛津词典》

In eighteen ninety-seven, a chemist named Felix Hoffmann at Friedrich Bayer and Company in Germany created acetyl salicylic acid.

VOA: special.2009.10.20

I wrote this son, my father and I wrote this song, for the acid victims of Kandahar City -- a few young girls who were trying to make their way home from school when they got attacked by acid.

VOA: standard.2010.03.08

There are other grapes grown in Savoie, too, most notably Gringet (a high-acid white said to be related to a grape from Jura, in eastern France) and Mondeuse blanche and noire (the latter is a bit like Syrah), as well as a few others that are yet more obscure.

WSJ: Not Just for Fondue: The Fresh Whites of Savoie

For molecular diagnostic tests Beckman Coulter has developed a nucleic-acid- sample detection instrument that separates fluorescent-dye-labeled DNA fragments for pattern recognition or further identification.

FORBES: Investment Guide

Omega-3 is a long-chain fatty acid critical for brain structure and function.

CNN: Opinion: Unlocking crime using biological keys