unstained
用法要点
句型搭配
常用于描述物体或材料的清洁状态，如“remain unstained”或“keep something unstained”，强调保持原状。
介词用法
常与介词“by”或“with”连用，表示未被某种物质污染，如“unstained by dirt”或“unstained with ink”。
语域说明
多用于正式或书面语境，如科学报告、商务文档或文学描述，较少在口语中频繁使用。
基础例句
The white shirt remained unstained after the spill.
白衬衫在泼洒后依然没有沾污。
She kept the tablecloth unstained by using a coaster.
她使用杯垫来保持桌布无污点。
The carpet looks unstained even with kids playing on it.
即使孩子们在上面玩耍，地毯看起来也没有污渍。
He washed the dishes until they were completely unstained.
他把碗碟洗得完全无污点。
高级例句
The laboratory sample must remain unstained for accurate analysis.
实验室样品必须保持无污染以确保分析准确。
In the contract, the company's reputation is described as unstained by any scandals.
合同中描述公司声誉未受任何丑闻玷污。
The historical document was preserved unstained, allowing for detailed study.
这份历史文件保存完好无污损，便于深入研究。
The audit report confirmed that the financial records were unstained by fraud.
审计报告确认财务记录未受欺诈影响。
高频搭配
verb
adjective
noun
adverb
preposition
phrase
常见错误
错误使用了动词形式“unstain”，正确应为形容词“unstained”，表示状态。
介词“from”不常用，应改为“by”或“with”来表示污染源。
近义词辨析
clean
clean 泛指干净，可能经过清洁；unstained 特指未被污渍沾染，强调原状。
The floor is clean (after mopping), but the wall remains unstained (never got dirty).
spotless
spotless 强调完全没有斑点或污点，常指非常干净；unstained 更侧重于未被特定物质污染。
Her record is spotless (no flaws at all), while the fabric is unstained (no specific stains).