n. an impression (especially one that is artificial or contrived)
n. the central meaning or theme of a speech or literary work
n. (of a law) having legal validity
n. a symptom caused by an illness or a drug
n. 结果, 影响, 效果, 印象
vt. 实行, 引起, 完成
[计] 效果
1. The new law had a positive effect on the community.
新法对社区产生了积极的影响。
2. Sleep can greatly affect your mood and energy levels.
睡眠可以大大影响你的情绪和精力水平。
3. The medicine will take effect in about 30 minutes.
这种药物大约在30分钟内起效。