effective wave number

例句：

1. 1.The new policy is expected to be effective in reducing pollution.
   预计新政策能有效减少污染。
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 leadership style is highly effective in boosting team morale.
   经理的领导风格在提升团队士气方面非常有效。