Fractional efficiency
[化] 分级效率
🧩 词语组成解析
fractional
['frækʃənl]
adj. [数]分数的，小数的;微小的，极小的;部分的，少量的;零碎的;
🗣️ 情景例句
Absolutely right, Betty.
完全正确， Betty。
A friend is never known till a man have need.
不到患难时，永远不能认识真正的朋友。
I am used to traveling by air and only on one occasion have I ever felt frightened.
我习惯了乘飞机旅行，只是有一次把我吓坏了。