He was sure that the casualness of the gesture was deliberate.

他确信那似乎漫不经心的姿态是有意装出来的。

《牛津词典》

She introduced herself with studied casualness.

她故作轻松地做了自我介绍。

《牛津词典》

T-shirts, the epitome of American casualness, have moved upmarket.

T恤，美国人的随意的标志，已提升至高档商品之列。

《柯林斯英汉双解大词典》

The space has a casualness to it, with an assemblage of vignettes for working and lounging.

WSJ: A Museum-Quality Living Room

Though I'm obviously to blame, I also fault the casualness of iPhone photography and Instagram (especially Instagram).

WSJ: How to Take Better Travel Photos

Tan and fit at 57 years old, Mr. Ayer speaks quickly and throws in management bromides with practiced casualness.

WSJ: The Weekend Interview with Bill Ayer: An Airline That Makes Money. Really.