Their sole objective is to achieve height with minimum structural effort (i. e. cost).

它们唯一的目标就是以更少的结构性付出(比如，成本)盖到更高。

youdao

Their sole objective is to achieve height with minimum structural effort (i. e. cost).

它们唯一的目标就是以更少的结构性付出(比如，成本)盖到更高。

youdao