She was able to keep her head and not panic.

她当时能够镇定自若、不慌张。

《柯林斯英汉双解大词典》

I got into a panic as I pressed firmly against the table and moved my head around trying to find the right angle, but it was no use.

我陷入了恐慌，我紧紧地贴着桌子，把头挪来挪去，试图找到合适的角度，但没有用。

youdao

The financial rescue plan passed by the US Congress is viewed as flawed but necessary to head off panic in financial markets and loss of confidence in the economy.

人们认为美国国会通过的金融纾困计划有缺陷，但对于防止金融市场中出现恐慌情绪、避免人们丧失对经济的信心，又是必要之举。

youdao

Neil will tell us how to profit by keeping a cool head while the markets panic.

FORBES: Steve Forbes Interviews Neil Hennessy

The first-half is that the self-fulfilling panic in the bond markets which reared its ugly head again in July is unlikely to return.

CNN: Eurozone still has mountain to climb

The head of one of the UK's biggest supermarkets has urged shoppers not to panic about the food they buy.

BBC: Iceland boss dismisses 'panic' over horsemeat in food