Definition
to avert or intercept a challenging or undesirable situation from occurring.
防止；预防
She stepped in quickly to head off the situation before it got out of control.
她迅速介入，在情况失控之前将其阻止。
When he noticed a potential problem, he took immediate action to head it off.
当他注意到潜在的问题时，他立即采取行动来阻止它。
The managers are working to adjust the budget to head off any potential economic crisis.
经理们正在努力调整预算，以防止任何潜在的经济危机。