B2 successful or achieving the results that you want能産生預期結果的;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實際上的;事實上的
If a law or rule becomes effective, it starts to be used.(法律法規)生效的
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