Elizabeth absent-mindedly picked a thread from his lapel.

伊丽莎白心不在焉地从他的翻领上拈起了一根线。

《柯林斯英汉双解大词典》

He went into the bathroom absent-mindedly and looked at himself in the mirror.

他心不在焉地走进了浴室，照着镜子看了看自己。

《柯林斯英汉双解大词典》

"That was what the Sowerby woman said," he muttered absent-mindedly.

“索尔比太太就是这么说的呀。”他心不在焉地嘟囔着。

youdao

You see, the customer had absent-mindedly finished his transaction but left his wallet on some counter.

FORBES: Fantabulous Tale Of Chase Bank Customer's Missing Wallet

Once I absent-mindedly put a bit of SodaMix in the water before I tried to carbonate it.

ENGADGET: Switched On: The rules of Soda Club (Part 1)

As he spoke, he waved his hand in a vague, regal gesture, like somebody absent-mindedly swatting away a fly.

NEWYORKER: The Conciliator