他的鲁莽决定引发了一场家庭争吵。

His reckless decision ___precipitated a family argument.

加入酸会沉淀溶液中的蛋白质。

Adding acid ___precipitates the protein from the solution.

暴雨引发山洪，泥石流突然从山坡上冲下。

The mudslide ___precipitated down the hillside after the heavy rain.