Fresnel
[计] 菲涅耳
🗣️ 情景例句
I don't have the heart to tell her.
我没有勇气告诉她。
He is distinguished as an economist.
他是一名著名的经济学家。
but the paper was wrapped round a drum which rotated slowly.
根但是纸是卷在慢慢旋转的圆筒上的。