Something that is effective works well and produces the results that were intended.
The project looks at how we could be more effective in encouraging students to enter teacher training.
该项目研究如何更有效地鼓励学生参加教师培训。
Simple antibiotics are effective against this organism.
普通的抗生素就能够有效地抑制这种微生物。
an effective public transport system.
一个有效的公共交通系统。
Effective means having a particular role or result in practice, though not officially or in theory.
They have had effective control of the area since the security forces left.
自从安全部队离开后,他们实际控制了这一地区。
When something such as a law or an agreement becomes effective, it begins officially to apply or be valid.
The new rules will become effective in the next few days.
这些新条例将在接下来的几天内生效。