She turned from me to smooth Matthew's cheek and curl a finger round his ear.

她转过去抚弄马修的脸颊，把手指绕在他的耳朵上。

youdao

Seidman recommends a mix of hot water and cool hydrogen peroxide in the ear, or covering your finger with a damp washcloth and gently cleaning the outer ear.

塞德曼建议用热水和凉的过氧化氢混合清洗一下耳朵，或用湿布或毛巾覆盖手指轻轻清洗外耳。

youdao

He stuck his finger deep in his ear and pulled it out quickly.

他用手指深挖耳朵并很快把手拿出来。

youdao

He had at least a dozen bruises of varying ages on his back, and infections to his ear, scalp and index finger.

BBC: Baby P examination details 'ignored' by official report

This probably helps them to work out from which direction the vibrations are travelling rather as a person might stick a finger first in one ear and then in the other to work out the direction that a sound is coming from.

ECONOMIST: Extra sensory perception