In a perilous situation, hanging by a thread; in imminent danger.
这个项目进展到关键阶段，如果资金链断裂，后果将是九鼎一丝，所以我们必须小心谨慎。
This project has reached a critical stage; if the funding chain breaks, the consequences will be extremely perilous, so we must proceed with great caution.
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