irrelevant

/ɪˈrɛləvənt/
If you describe something such as a fact or remark as irrelevant, you mean that it is not connected with what you are discussing or dealing with.
例：
…irrelevant details.

relevant

correct or suitable for a particular purpose:
plans to make schooling more relevant to life beyond school

having ideas that are valuable and useful to people in their lives and work 有价值的；有意义的
Her novel is still relevant today.她的小说今天仍有现实意义。

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She is more than capable of doing the job and her age is irrelevant.
irrelevant to :
I understand your point, but it is irrelevant to the discussion.
Making a large profit is irrelevant to us - the important thing is to make the book available to the largest possible audience.
largely irrelevant :
These documents are largely irrelevant to the present investigation.