effective normal stress

例句：

1. 1. Thenew 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 against the common cold.
   这种药对普通感冒有效。
3. 3. The manager's leadership style is effective in improving team morale.
   经理的领导风格在提高团队士气方面是有效的。