effective target length

例句：

1. 1. The new policy isexpected to be effective in reducing pollution.
   预计新政策能有效减少污染。
2. 2. Themanager's leadership styleis highly effective in boostingteam morale.
   经理的领导风格在提升团队士气方面非常有效。
3. 3. The newsoftware is expected to be effective in improvingefficiency.
   预计新软件能提高效率。