effective target area

例句：

1. 1.The new policy is expected to be effectivein reducing pollution.
   新政策预计将有效减少污染。
2. 2. The medicine is effective against the commoncold.
   这种药对普通感冒有效。
3. 3. Themanager's leadership style is effective ininspiring teamwork.
   经理的领导风格在激发团队合作方面是有效的。