As a consequence, you don't need to make the long and difficult trip to our home world.
His was the most difficult trip, because he had nobeast to give him a good starting push.
Arranging a difficult trip can be a pleasure in itself, surely.
At the best of times it is a difficult trip.
Some songs recounted the difficult trip to Utah in the first place.
"That makes it not only a very difficult trip physically, but emotionally."
It would be a difficult and exhausting trip for him as a passenger.
Then will I have to make a very difficult trip.
It was a difficult trip, and it got off to a very bad start.
On a difficult trip like this, it may even be dangerous to all of us unless we can be good friends.