记忆方法
双解例句
小知识
The adjective efficient describes function and use with the least amount of waste and most economy.
When you want to define the adjective efficient, it's a good idea to say as much as you can in as few words as possible because to be efficient is to be economical and avoid waste in actions or uses. The word comes from the Latin efficientem which means “work out” or “accomplish.” Synonyms of efficient are effective, productive, and competent.
实用短语
常用短语
单词用法
He?s not very efficienthe works very slowly.
他不是很有效率,做的很慢。
efficient与effective,effectual和efficacious都不同:
effective是“很有效的”意思,用于事物或人,一般是呈现出正确的结果或是解决了问题。
effectual是“达到目的的”意思,不能用于人。
efficacious是“必然有效的”意思,程度比effective轻,尤指药品。
efficient是“有效率的”,可以用于人,事物和行为。
effective:侧重产生实际的效果、效力或具有取得预期效果的能力,指人指物都适用。
efficient:侧重指积极有效,效率高,效果好,节省精力。指人时,强调其能干、熟练的技巧。
词根词缀
词根: fici
=do,make 表示”做,制作”
adj.
deficient 缺乏的, 不足的, 不完善的de去掉+fici做,制作+ent……的→做得不够的→不足的
efficient 有效的,效率高的;有能力的,能胜任的ef出+fici做,制作+ent……的→能做出事来→有效的
proficient 精通的;熟练的pro前面+fici做+ent……的→做在[别人] 前面→精通
n.
proficiency [in]熟练,精通proficient[[adj.精通的;熟练的]]→n.[in]熟练,精通
同义词辨析
同义词
economical / saving / thrifty
active / potent / powerful / effectual / operant / operative / productive / effective / valid / efficacious
workmanlike / capable / able / qualified / competent
technical / practical / expeditious / accomplished / experienced
反义词
同根词
词根:efficient
adj.efficacious有效的;灵验的
adv.efficiently有效地;效率高地(efficient的副词形式)
efficaciously有效地;灵验地
n.efficiency效率;效能;功效