She poured the dark brown liquid down the sink.

她把深棕色的液体倒进了污水池。

《牛津词典》

Appearance Status: This product is brown liquid.

外观状态：本品为褐色液体。

youdao

The Chinese medicine, a brown liquid with a bitter taste, seems to be effective.

棕色流质带有苦味的中药，似乎有效。

youdao

Brown and green liquid flowed into the water and black smoke filled the sky.

VOA: special.2009.07.13

In the scullery she found several fat demijohns of brown liquid bubbling through airlocks.

BBC: CLOUD ATLAS, BY DAVID MITCHELL

The report did not specify what the brown liquid dripping on dishes was, or where it came from.

CNN: Cruise ship fails CDC health inspection

According to the CDC report, during the August 19 surprise visit, inspectors found brown liquid dripping on clean dishes, refrigerators out of order, improper installation of anti-entrapment drain covers in pools posing a possible danger to swimmers, faulty dishwashers that managers allegedly failed to do anything about until inspectors arrived and water from a broken ice machine leaking onto the pool deck.

CNN: Cruise ship fails CDC health inspection