a losing battle
US /ə ˈluːzɪŋ ˈbætəl/
UK /ə ˈluːzɪŋ ˈbætəl/

1.
注定失敗的戰鬥, 徒勞的努力
a struggle or effort that is certain to fail
:
•
Trying to convince him is a losing battle; he never changes his mind.
試圖說服他是一場注定失敗的戰鬥;他從不改變主意。
•
Fighting against the new policy felt like a losing battle.
與新政策作鬥爭感覺像是一場注定失敗的戰鬥。