Instead, to demonstrate the "red effect" I should have used an image of an elderly man solving a system of differential equations using a red pen.

相反，为了证明“红色效应”，我应该使用一张一个老男人用红笔求解微分方程系统的图像。

youdao

Instead, to demonstrate the "red effect" I should have used an image of an elderly man solving a system of differential equations using a red pen.

相反，为了证明“红色效应”，我应该使用一张一个老男人用红笔求解微分方程系统的图像。

youdao