Don't you agree with me that it would probably take a really long time, and you would probably get lost, if you had to go up and down all of the mountains, as opposed to if you just drilled a flat tunnel that could go straight on through?
Precisamos concordar que provavelmente levaria muito tempo, e você talvez se perderia, se tivesse que subir e descer  todas as montanhas, em vez de perfurar um túnel, que poderia seguir em linha reta.