环境保护和节约
Environmental protection and conservation
以上为机器翻译结果，长、整句建议使用 人工翻译 。
它具有运能大、速度快、安全准时、成本低、节约能源、以及能缓解地面交通拥挤和有利于环境保护等优点。
It has advantages such as large transport capacity, high velocity, safe, punctuality, low cost, energy conservation, as well as mitigation of ground traffic jam and environment protection.
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