自若地

She performs the duties of a princess with great aplomb.

她泰然自履行王妃的职责。

Everyone was rushing round trying to get things ready, and he just sat there, cool as a cucumber.

大家都忙做准备，只有泰然自在那里。

It was Brently Mallard who entered, a little travel-stained, composedly carrying his gripsack and umbrella.

进来的是布兰特雷•马兰德，虽略显旅途劳顿，但泰然自的大旅行包和伞。