effective quantum number

例句：

1. 1. The new policy isexpected to be effective in reducing pollution.
   新政策预计将有效减少污染。
2. 2. Themedicine is effective for treatingthe common cold.
   这种药对治疗普通感冒是有效的。
3. 3. The manager's leadership style is highly effective inboosting team morale.
   经理的领导风格在提升团队士气方面非常有效。