成本效益分析。

A cost-benefit analysis

景观效益和生态效益不好；

Landscape benefit and ecological benefit is not good.

具有较好的环境效益和经济效益.

It has better environmental benefit and economic benefit.

取得显著的社会效益和经济效益。

It has acquired obvious social and economic benefit.

取得良好的经济效益。

A good economic benefit was reached.