a cost-effective + noun
作定语时直接放在名词前，常见搭配有 a cost-effective way/solution/option。
The team is looking for a cost-effective way to cut energy use.
团队正在寻找一种划算的降低能耗的办法。
划算的；合算的；性价比高的
合算的；经济上划算的；相对于成本有成效的；有成本效益的；划算的; 合算的(等于cost-efficient)
Giving enough benefit or value to be worth the money, time, or effort spent; economical.
合算的；经济上划算的
Returning a benefit that justifies the initial investment; economical.
相对于成本有成效的
productive relative to the cost
Using solar energy is a cost-effective way to reduce electricity bills.
使用太阳能是减少电费的一种划算的方式。
用法提示：cost-effective 在此作定语，修饰 way，表示‘划算的’。
This solution is more cost-effective than the one we used before.
这个方案比我们以前用的那个更划算。
用法提示：cost-effective 作表语，用比较级形式表示‘更划算’。
The company found that outsourcing was cost-effective for small projects.
公司发现外包对小项目来说是划算的。
用法提示：cost-effective 作表语，描述 outsourcing 的性质。
作定语时直接放在名词前，常见搭配有 a cost-effective way/solution/option。
The team is looking for a cost-effective way to cut energy use.
团队正在寻找一种划算的降低能耗的办法。
作表语，常用 be、prove、seem 等系动词，说明某事物是否划算。
Solar panels proved cost-effective over the long term.
从长远来看，太阳能板证明是划算的。
比较级是 more cost-effective，最高级是 most cost-effective，后面用 than 引出比较对象。
Taking the train is more cost-effective than flying for short trips.
短途出行坐火车比坐飞机更划算。
用 it 作形式主语，真正的主语是后面的不定式。
It isn't cost-effective to repair such old equipment.
修理这么旧的设备并不划算。
grammar · medium
易错句子This software is cost-effective to small businesses.
正确表达This software is cost-effective for small businesses.
表示“对……来说”时，cost-effective 后应用介词 for，而不是 to。to 通常用于不定式结构（It is cost-effective to do sth）。
grammar · medium
易错句子They run the factory cost-effective.
正确表达They run the factory in a cost-effective way.
cost-effective 是形容词，不能直接修饰动词 run。修饰动词需用副词或介词短语，如 in a cost-effective way（以划算的方式）。
grammar · medium
易错句子It is cost-effective buying a yearly pass.
正确表达It is cost-effective to buy a yearly pass.
It is + 形容词 + to do 是固定句型，it 为形式主语，真正主语用不定式 to buy，不能用动名词 buying。
efficient 只强调以最少投入产出最多，不涉及花费划不划算；cost-effective 则强调相对于所花成本而言收益值得。
economical 侧重省钱、消耗少，重点在花得少；cost-effective 重点在投入与收益相称、值得，未必便宜。
affordable 只说价格在承受范围内，不评价回报；cost-effective 强调这笔支出的收益与成本相比划算。
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