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
I finally got around to the job again.
我终于能再做那份工作了。
I'm writing to an old friend.
给一个老朋友。
I would not hear of the suggestion and said that I would fix it myself.
我不愿听妻子的建议，说我自己会修。