曝

internal exposure (to radiation)

aeration

external exposure (to radiation)

person exposed to a harmful amount of radiation (from a bomb, industrial disaster, lab experiment, etc.)

airing of books

low level radiation

radiation exposure

to expose to the wind

to weather (e.g. by long exposure to sun or rain)

airing of clothes, hanging scrolls, etc. (to prevent damage from insects and mould)

being exposed to radiation