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
I had a big breakfast, so I think I'll skip lunch today.
我吃了一顿丰盛的早餐，所以打算不吃午饭了。
Every dog is valiant at his won door.
狗在家门前条条都凶悍。
Are you doing much sport?
你常做运动吗？