镇定自若

zhèndìngzìruò

镇定自若 — zhèndìngzìruò

1. calm and composed; remaining calm and unperturbed in the face of danger, surprise, or pressure

   面对突发情况，他仍然镇定自若，指挥救援。 miànduì tūfā qíngkuàng tā réngrán zhèndìngzìruò zhǐhuī jiùyuán — Faced with an unexpected situation, he remained calm and composed while directing the rescue.