late 14c., "serving to effect the intended purpose," from Old French effectif, from Latin effectivus "productive, effective," from effect-, stem of efficere (see effect (n.)). Of military forces, meaning "fit for action or duty" is from 1680s.
权威例句
1. Condoms are an effective method of birth control if used with care.
如果使用得当,避孕套是很有效的避孕手段。
2. Light colours provide an effective backdrop for pictures or a mirror.
浅色是挂放图画或镜子很有效果的衬托。
3. Women are sometimes seen to be less effective as managers.
女性有时被认为不善于管理。
4. The initial image projected was of a caring, effective president.
他最初表现出的是一个充满爱心、办事有效的总统形象。
5. The bank must be run in a cost-effective way.
银行的经营必须追求成本效益。
词语辨析
【efficient, effective】
这组词都有“有效的”的意思,其区别是:
efficient: “效率高的”,“有能力的”,用以指人或物,着重有效地利用时间、精力并取得预期效果。如:The German telephone system is highly efficient. (德国的电话系统效率很高。)
effective: 常用以指物,强调能产生某种预期的效果。如:effective medicine, effective method等。