I asked him why. He looked a little sheepish when he answered.

我问他为什么。他回答时看起来有点困窘。

《柯林斯英汉双解大词典》

Mary gave her a sheepish grin.

玛丽难为情地冲她咧嘴一笑。

《牛津词典》

Tom was tugging at a button-hole and looking sheepish.

汤姆拽着一个钮扣孔，一副害羞的样子。

youdao

The men entered the hearing room from different entrances, Clemens serious in a dark blue suit with a red tie, McNamee wearing a sheepish smile and a charcoal gray suit.

FORBES: Hard Ball In The Beltway

They expressed regret, along with a sheepish acknowledgment that they had learned their lesson.

WSJ: Heroes Shine Amid Storm's Destruction

"Frankly, we overestimated its market, " a sheepish Burge admitted after the sale.

FORBES: Revenge of the Nerds