crit·i·cal·ly /-k(ə)lɪ/ 副詞
1. In a critical manner; with nice discernment; accurately; exactly.
Critically to discern good writers from bad. --Dryden.
2. At a crisis; at a critical time; in a situation, place, or condition of decisive consequence; as, a fortification critically situated.
Coming critically the night before the session. --Bp. Burnet.
adv : in a critical manner; "this must be examined critically"