Who is to blame

keep a straight face - miàn bù gǎi sè

Right and wrong - yán shì rén fēi

cliffide flower - gāng róu xiāng jì

consider others in one 's own place - tuī jǐ jí wù

As long as you work hard, you can grind an iron pestle into a needle - zhǐ yào gōng fū shēn，tiě chǔ mó chéng zhēn

day and night - yǐ yè jì zhòu

single-hearted - chéng xīn shí yì

Hard work - láo jīn kǔ gǔ

There is nothing to be ashamed of - bǎi wú yī kān

be strictly just and impartial - shǒu zhèng bù ráo