be unnoticeable
系表结构，描述某物不引人注意。
The stain on the wall is almost unnoticeable.
墙上的污渍几乎不显眼。
不显眼的；不易察觉的
不显眼的；难以察觉的。；不显明[显著]的
不显眼的；难以察觉的。
Not noticeable.
The stain on the carpet was almost unnoticeable.
地毯上的污渍几乎看不出来。
用法提示：unnoticeable 作表语，表示“不易察觉的”。
She made a small, unnoticeable change to the document.
她对文件做了一个微小、不引人注意的改动。
用法提示：unnoticeable 作定语，修饰 change，表示“不引人注意的”。
The difference between the two colors is unnoticeable to most people.
这两种颜色之间的差别对大多数人来说是察觉不到的。
用法提示：unnoticeable 作表语，后接 to most people，表示“难以察觉”。
系表结构，描述某物不引人注意。
The stain on the wall is almost unnoticeable.
墙上的污渍几乎不显眼。
指明对于某人来说不可察觉。
The change in temperature was unnoticeable to most people.
温度变化对大多数人来说不明显。
与 remain 连用，表示持续不被察觉。
Her mistake remained unnoticeable until the final review.
她的错误直到最终审查才被注意到。
grammar · medium
易错句子She slipped out of the room unnoticeable.
正确表达She slipped out of the room unnoticeably.
形容词“unnoticeable”不能修饰动词“slipped out”，应使用副词“unnoticeably”来修饰动作的方式。
grammar · medium
易错句子The error went unnoticeable.
正确表达The error went unnoticed.
“go unnoticed”是固定搭配，表示“未被注意”，而“unnoticeable”强调事物本身不易被察觉的特性，不用于描述“变得未被注意”的过程。
unnoticeable 强调客观上难以被注意到，而 inconspicuous 常指有意或无意地不引人注目，多用于形容外观或行为
unnoticeable 指可能被注意到但不明显，imperceptible 则强调完全无法被感知或察觉，程度更强
unnoticeable 侧重于不被注意到，unremarkable 侧重于缺乏特色而不值得注意，多用于评价质量或性质
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