take advantage of another 's perilous state

pinch pennies - fēn jīn bō liǎng

a good medicine tastes bitter - kǔ kǒu liáng yào

of great momentum - qì shì páng bó

limited capacity - niú tí zhī cén

rob other's good point - lüè rén zhī měi

Turn the corner - zhuǎn wān mò jiǎo

autumn scenery - jīn fēng yù lù

do harm to sb . through the hands of another - jiè jiàn shā rén

generous outside but jealous inside - wài kuān nèi jì

a spent force - qiáng nǔ zhī jí