tip the scales
左右某種情況或決定的結果，通常是通過施加影響或增加權重來實現
書面/口語·描述決定性影響
英文釋義
to influence a situation in a particular way, especially in favor of one side or outcome
例句
Her vote tipped the scales in favor of the new policy.
典故來源
源自天平稱重，通過增加砝碼使天平傾斜，比喻施加影響改變結果。