Translation of betrübt

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.
But I guess that most children are that way. Maybe there are a few children that really want to be educated, but I think that these children grow up to fast. They need to enjoy their childhood.
After a long sleep we ordered a cab which took us from the hotel to the airport. We were a little sad to leave. The flight over the South China Sea lasted two hours. We landed in Hong Kong's new airport.