What does how to maintain mean eg how to maintain straighteners?

To keep in an existing state.

Homeostasis is to conserve the normal function inside and organ or a body, any illness, trauma, infection or disruption of the normal functioning of the body is considered breaking of the homeostasis.

To help keep someone from being hurt, harmed, attacked, or injured, physically or otherwise.

Your GPA is your grade point average in school. for each grade you get (A, A- B+ etc.) it is assigned a certain amount of points with and "A" having the highest amount of points. At the end of each...

To be able to keep making money even though you have to buy stuff. The income is greater than the expenses basically...