contamination precipitation的用法和樣例：
例句
- Various substances in plant extracts may cause spontaneous or non-specific precipitation.
植物提取液中的各種物質都可能引起自發的或非專化性的沉澱。 - Solvent extraction technique in the refining of platinum metals has many obvious advantages over the traditional precipitation method.
鉑族精鍊中的溶劑萃取法比傳統的沉澱法具有許多優點。
