Effective aperture
[化] 有效孔径
🧩 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 like to study in the library because it's so quiet.
我喜欢在图书馆学习因为那儿很安静。
I will come back with him if he asks me.
我会和他走回来，假如他要求我的话。
The petrol had nearly all been used up.
汽油几乎已经用光。