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

1.
名義上的, 徒有虛名
existing in title or theory but not in reality
:
•
He is the manager in name only; his assistant does all the real work.
他只是個名義上的經理;他所有的實際工作都是他的助理做的。
•
Their marriage was in name only; they lived separate lives.
他們的婚姻只是名義上的;他們過著各自的生活。