Translation of betriebsfähig

He also told me that he had build his scooter by himself. I could not understand how a doctor was able to build such a machine on his own. It seems that the circumstances made people capable of many things.
Did you hear about the earthquake this morning in Greece. This is really terrible, I think that quite a few viligars lost their lifes and many more lost their homes. I am really sad for all of them.
We spent the entire day walking around the city, looking for gifts for our friends and for family back at home. It was a nice and relaxing last day. In the late afternoon, we decided to buy shoes.