She is doing some subbing at the school this week.
The act of temporarily taking the place of someone else, especially in a job or role.
He is subbing for the teacher today.
To act as a substitute for someone else, especially in a job or role.
I am subbing out the old parts for new ones.
To replace or exchange something with another.
С мощным бесплатным словарём с картинками и флэшкартами.
