miàn duì / tū fā / zhuàng kuàng / tā / biǎo xiàn / de / lǎo chéng chí zhòng / xùn sù / wěn dìng / le / dà jiā / de / qíng xù

面对突发状况，她表现得老成持重，迅速稳定了大家的情绪。

Facing the emergency, she acted with calm composure and quickly calmed everyone down.