nonchalance

His eyes, blue as the summer sky, gave away his fierce devotion to his friends, even when he tried to feign nonchalance..他的眼眸蓝如夏日晴空，泄露了他对朋友们的深情厚意，尽管有时他试图装出一副冷淡的样子。

Your irresolute attitude, coupled with your irrepressible sense of nonchalance simply is inappropriate to the seriousness of the situation..你犹豫不决的态度以及抑制不住的冷淡与事态的严重性完全不相称。

Scarlett turned away from Mammy with studied nonchalance , thankful that her face had been unnoticed in Mammy’s preoccupation with the matter of the shawl ..思嘉故意装出一副冷淡的样子掉过头去，幸喜嬷嬷正一个劲儿唠叨披肩的事，不曾看见她的脸。