un·flap·pa·ble /-ˈflæpəbəl/
(a.)不慌張的,鎮定的
unflappable
adj : not easily perturbed or excited or upset; marked by extreme
calm and composure; "hitherto imperturbable, he now
showed signs of alarm"; "an imperturbable
self-possession"; "unflappable in a crisis" [syn: imperturbable]