Definition
To be in a situation where one is unable to provide evidence or justification for their claims or actions.
無法證明
Without any written agreement, they don't have a leg to stand on in the legal case.
沒有任何書面協議，他們在法律案件中根本站不住腳。
He tried to argue his case, but with no evidence to back it up, he didn't have a leg to stand on.
他試圖為自己的案子辯護，但沒有證據支持，他根本站不住腳。
If they don't have records proving they made the payment, they don't have a leg to stand on in the dispute.
如果他們沒有記錄證明他們已經付款，他們在爭議中根本站不住腳。