资料来源 : pyDict

不慌张的,镇定的

资料来源 : WordNet®

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}]