adulterating

The lab found an adulterating substance in the bottled juice.

用法提示：adulterating 作定语修饰 substance，表示“掺杂的、使不纯的”。

Cheap spice blends often contain adulterating powders that are hard to detect.

用法提示：adulterating 放在 powders 前作形容词，表示粉末有“使香料不纯”的作用。

An adulterating chemical in the flour caused the bitter taste.

用法提示：adulterating 作前置定语，说明该化学物质会使面粉变不纯。