effective
/əˈfek.tɪv/
形容词
能产生预期结果的；有效的
She's a very effective teacher.
她课教得非常好。
实际上的；事实上的
Although she's not officially our boss, she's in effective control of the office.
她虽然名义上不是我们的老板，但实际上掌管着该办事处。
（法律法规）生效的
The new laws will become effective next month.
新法律将在下月正式生效。