Once or twice I heard her muttering, but when I said, "Sorry? What did you say?" she didn't respond.

有一两次我听见她在嘀嘀咕咕，但当我说“抱歉? 你说什么？”时，她没有回答。

《柯林斯英汉双解大词典》

"Oh!" said she, "I heard you before; but I could not immediately determine what to say in reply."

“噢，”她说，“我早就听见了；可是我一下子拿不准应该怎样回答你。”

youdao

I was waiting for the elevator when I heard MacArthur calling, "What was that you said about sports?"

等电梯时，我听到麦克阿瑟喊道：“你说什么体育？”

youdao

You heard what I said about my tax plan.

WHITEHOUSE: The White House

Now, I heard what you just said, and the question he just asked is related to this.

WHITEHOUSE: Press Briefing

And you saw what I said yesterday and heard what I said yesterday, and our assessment of it.

WHITEHOUSE: Press Briefing