She wore her hair loosely knotted on top of her head.

她在头顶上打了个松松的发髻。

《牛津词典》

Her wiry hair was pushed up on top of her head in an untidy bun.

她那硬直的头发被向上梳起，在头顶盘成一个乱蓬蓬的髻。

《柯林斯英汉双解大词典》

You will notice that your baby has two soft areas on the top of his head.

你会注意到你孩子的头顶有两个柔软的部位。

《柯林斯英汉双解大词典》

For years, researchers blamed muscle tension from tightening in the face, neck and the skin on top of the head.

VOA: special.2010.03.30

At the top of it is the head of the household, the man, the paterfamilias.

金字塔顶端是一家之主，男人，即家长。

耶鲁公开课 - 新约课程节选

Alums with Nobel prizes? Oh, I don't... I can't think of any like, off the top of my head.

获得诺贝尔奖的校友吗？这个……我一时还想不出来。

知道约翰·纳什吗？ - SpeakingMax英语口语达人

Previously, he said he couldn't think of any right off the top of head.

CNN: Bush, Kerry bare knuckles in second debate

He has an unmissable shock of straight white hair, and one afternoon I saw the top of his head moving past the top of my cubicle.

FORBES: What Are Some Particularly Awkward Things That Can Happen To People At Harvard?

How -- was he just speaking off the top of his head in terms of things that might be?

WHITEHOUSE: Press Briefing