effective income

例句：

1. 1.The new policy is expected to be effective in reducing pollution.
   新政策预计将有效减少污染。
2. 2. The medicine is effective for treating the common cold.
   这种药对治疗普通感冒有效。
3. 3. The manager's suggestions were very effective in improving the company's performance.
   经理的建议在提高公司业绩方面非常有效。