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Not guaranteed to be useful or effective.
这个方法看起来很高级，但不一定有用。
This method looks advanced, but it's not necessarily useful.
多读书不一定有用，关键是要读对书。
Reading a lot isn't necessarily useful; the key is to read the right books.
Often used to express skepticism about the effectiveness of something.
Use '不一定有用' to politely disagree or express skepticism when someone claims something is useful. Example: '你说这个软件很棒，但我不一定有用。'
This phrase is neutral to slightly negative. It implies doubt rather than outright rejection.
The phrase combines three Chinese words: '不一定' (bù yī dìng, 'not necessarily') and '有用' (yǒu yòng, 'useful'). It emerged as a natural colloquial expression in modern Mandarin.
Commonly used in casual conversation to express doubt about the effectiveness of something. Often paired with '但是' to contrast with a previous statement.