Examples

眉头打结

knit one's brows → 打结

眉头紧锁

frown severely → 眉头

他寻思了半天，眉头一皱，计上心来。

He thought to himself for a while. He knit his brows heavily and at last a plan was born in his heart. → 眉头一皱，计上心来

问题解决了，老人家紧锁的眉头也舒展了。

Once the problem was solved, the old man's knitted brows became smooth again. → 舒展

他眉头一皱， 计上心来， 立刻就想出了解决问题的方法。 → 眉头一皱,计上心来

他眉头一皱， 计上心头， 立刻就想出了解决问题的方法。

He knitted his brows and a solution suddenly came to mind. → 眉头一皱,计上心来

皱着眉头。 → 皱

皱着眉头思索。 → 眉头

to screw up one's eyes/face

眯起眼睛/皱起眉头 → screw up

She frowned as though deep in thought.

她皱着眉头好像陷入深深的沉思。 → thought