be irrelevant to

与…不相干；不切题

be harmful to, be ignorant of, be in (good) shape, be in charge of, be in despair, be in drink, be in fashion, be in for, be in honour of sb.(sth.), be in love with, be in one's hands, be in sb.'s (sth.'s) honour, be in sympathy with, be in the habit of, be in the wrong, be incapable of, be inferior to, be innocent of..., be interested in, be involved in, be jealous of, be keen about, be keen on, be known as, be known for, be known to, be likely to, be located in, be lost on, be loyal to, be made of, be made up of, be made up of..., be married to sb., be native to, be no match for, be noted as, be noted for, be occupied in, be off one's head,