고등학생인데.. 영어 공부중 이 부분들 정말 말을 매끄럽게 못만들겠더라구요

도와주세요

We gaze in open-mouthed wonder at multi-story skyscrapers.

It hardly ever occurs to us that each bridge is a challenge to the skill of the engineer who sits at his desk, and solves technical problems such as the type of bridge to be used, the precise design and weight of arches and pillars, and the kinds and amount of steel reinforcement to be used in the concrete.

이렇게 두가지입니다 !