to lose efficacy; to no longer be in force
Example Sentences
药品在开封之后如果存放不当受潮变质，其有效化学成分就会迅速分解失效。
yào pǐn zài kāi fēng zhī hòu rú guǒ cún fàng bù dàng shòu cháo biàn zhì, qí yǒu xiào huà xué chéng fèn jiù huì xùn sù fēn jiě shī xiào.
If medicines are stored improperly and deteriorate due to moisture after being opened, their effective chemical components will quickly decompose and become ineffective.
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