在激烈的辩论中，两位候选人正面交锋，互不相让。

During the heated debate, the two candidates were ___eyeball-to-eyeball, neither willing to back down.

在紧张的谈判中，双方代表面对面坐着，谁也不肯让步。

During the tense negotiation, the representatives sat ___eyeball-to-eyeball, neither willing to compromise.