成本效益的英文：
cost effectiveness ;costbenefit

参考例句：

and the relative cost-effectiveness of alternative approaches to limiting risks
以及采用替代方法控制风险的相对成本效益。

Poverty and Hunger discusses a variety of cost-effective ways to increase food security in the short term
《贫穷与饥饿》讨论了在短期中提高粮食保障水平的各种各样注意成本效益的方法。

cost是什么意思：
v. 花费；使付出；估价
n. 费用；代价；成本；损失

Cost was no consideration.
费用无关紧要。

The cost will be astronomical.
费用将是一笔天文数字。

These costs are charged to an asset account entitled organization costs.
这些成本被计入一个名为开办费的资产账户。

effectiveness是什么意思：
n. 有效，效力

This parameter has no effect.
此参数不起作用。

The drug was of no effect.
这药无效。

The helpful effect on propellant slosh effects was a secondary consideration
推进剂晃动的有利性影响是一个次要的考虑因素。