Effective diameter
[机] 有效直径
🧩 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
He did it in no time.
他马上做了那件事。
In the kingdom of blind men the one-eyed man is king.
盲人国里，独眼称王。
Men, particularly, spend hours of their leisure time installing their own fireplaces, laying out their own gardens; building garages and making furniture.
特别是男人，常利用空闲时间安装壁炉、布置花园、建造车库、制作家具。