in name only
US /ɪn neɪm ˈoʊnli/
UK /ɪn neɪm ˈoʊnli/

1.
名义上的, 徒有虚名
existing in title or theory but not in reality
:
•
He is the manager in name only; his assistant does all the real work.
他只是个名义上的经理;他所有的实际工作都是他的助理做的。
•
Their marriage was in name only; they lived separate lives.
他们的婚姻只是名义上的;他们过着各自的生活。