有效的形容词英文怎么说

有效的形容词英语是 "effective."

"Effective" 来自于拉丁语的 "efficax," 意思是 "能产生效果的"或 "有效的."

例句:

The new marketing campaign was highly effective in increasing sales.
(新的营销策略在增加销售方面非常有效。)
The medication was effective in treating her symptoms.
(药物有效地治疗了她的症状。)
The teacher's methods were very effective in helping the students learn.
(教师的方法在帮助学生学习方面非常有效。)