力透纸背

cóng wù lǐ xué de jiǎo dù lái fēn xī mò zhī yǔ zhǐ de mó cā kě bǎ bǐ lì zhù rù dào diǎn huà xiàn tiáo zhōng dá dào lì tòu zhǐ bèi rù mù sān fēn de xiào guǒ

从物理学的角度来分析，墨汁与纸的摩擦，可把笔力注入到点画线条中，达到力透纸背、入木三分的效果。

From a physical perspective, the friction of ink and paper puts the stroke strength into the dots and lines, achieving forceful and penetrating effect.