百折不挠

miàn duì kùn nan wǒ men yào yǒu bǎi zhé bù náo de jīng shen

面对困难，我们要有百折不挠的精神。

In face of difficulties, we must have the spirit of indomitable.

tā yǒu bǎi zhé bù náo de yǒng qì

他有百折不挠的勇气。

He has unflinching courage.

wǒ men yào xué xí gé mìng xiān bèi bǎi zhé bù náo de jīng shen

我们要学习革命先辈百折不挠的精神。

We must learn from the indomitable spirit of our revolutionary ancestors.