B2 successful or achieving the results that you want能产生预期结果的;有效的
More examples
Yoga is a very effective technique for combating stress.
I've never found screaming and shouting at my staff to be very effective.
This tiny capsule contains two types of effective painkilling ingredients.
If the law is to be effective it must be applied fairly.
This style of decoration is simple yet effective.
[ before noun ] in fact, although not officially实际上的;事实上的
If a law or rule becomes effective, it starts to be used.(法律法规)生效的
adjective¹
adjective²
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