He laughed incredulously.

他满腹狐疑地大笑起来。

"You told Pete?" Rachel said incredulously. "I can't believe it!"

“你告诉皮特了？”雷切尔怀疑地说道。“真不敢相信！”

She looks at you incredulously.

她难以感到置信地看着你。

I smiled incredulously.

我怀疑地笑了笑。

Her host looked at her incredulously.

她的男主人难以置信地看着她。