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》

After blow-drying your hair at night, put it up in a high, loose bun on the top of your head, secure with a clip, then go to sleep.

晚上吹干头发后，将头发在头顶挽成一个松松的发髻，再用卡子固定好，就可以放心去睡大觉了。

youdao

He was wearing a T-shirt that was too big for his skinny body, and his hair, grayish white, was pulled up into a bun on top of his head.

身材瘦小的他穿着一件太大的T恤，灰白色的头发在头顶上盘了一个发髻。

youdao

He was wearing a T-shirt that was too big for his skinny body, and his hair, grayish white, was pulled up into a bun on top of his head.

NEWYORKER: Alone