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词汇 *effective
释义 *ef·fec·tive /ə`fɛktɪv; ɪˈfektɪv/
adj
1 producing the result that was wanted 有效的,产生预期效果的:
a very effective treatment for headaches 一种治疗头痛很有效的方法
an effective advertising campaign 有收效的广告宣传活动
→ opposite 反义词 INEFFECTIVE
2 be/become effective to start being used officially 开始生效/实施:
These prices are effective from April 1. 这些定价自四月一日起生效。
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