高层建筑像一柄双韧剑，利弊共存，既有节约土地不可代替的价值，又有破坏人居环境的潜在威胁。
High rise buildings appear like a double bladed sward: it is valuable in saving land, but potentially dangerous in damaging human being's residential environment.
但与此同时，技术是一把双韧剑，在为人类美好生活服务的同时，也给人类居住的自然环境带来前所未有的破坏。
But at the same time, technology is a double-category sword. It not only has provided good service for human life, but also has destroyed human living environment unprecedented.
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