Effective concentration
[化] 有效浓度
🧩 词语组成解析
effective
[ɪ'fɛktɪv]
adj. 有效的;起作用的;实际的，实在的;给人深刻印象;
n. [军]现役兵额，有生力量，精兵;
ef出+fect做，制作 +ive形容词后缀 →做出来的 → 有效的
🗣️ 情景例句
Off-season clothes are usually sold at very attractive prices.
换季衣服的售价通常挺吸引人。
The doctor said I looked pale and tired.
医生说我看起来苍白和疲倦。
Reporters kept pressing for interviews so lawyers had to be employed to act as spokesmen for the family at press conferences.
由于记者纷纷要求会见，他们不得不请了律师充当他们家的发言人举行记者招待会。