Zài shēngsǐ-yōuguān de jǐnjí qíngkuàng xià, tā bǎochí le lěngjìng.
He remained calm in the life-or-death emergency.
Tips
memory
攸 (yōu) is a rare literary character meaning 'place where' or 'that which.' 攸关 means 'to be vitally connected to.' Think of 攸 as the classical version of 所.