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?
그렇지 않나요? 시간이 매우 오래 걸릴 수도 있고 길을 잃을 수도 있어요. 산을 오르락 내리락해야 한다면요. 평평한 터널을 따라 쭉 가는 게 아니라요.