若无其事

He behaved as if nothing had happened.

他装作若无事的样子。

He sauntered casually through the door.

他若无事地走过了那道门。

He appeared nonchalant in court even when the judge ordered him to pay ￡1000.

在法庭上，甚至当法官命令他赔偿一千镑时，他现得若无事。

She affected to be spunky about her ailments and afflictions, but she was in fact an utterly self-centered valetudinarian.

她装做的失调和苦恼若无事，但是实际上她是为的健康状况非常发愁的人。