It is no concern of yours.

When the grain is cheap, the farmers suffer

remake nature

with an assumed name

change one's whole name

boost each other

take measures suited to the circumstances

sages and men of virtue in ancient times

Hills and passes form obstacles to one.

insist on having one's own way

a vast field(a wide prospect)

study the past and foretell the future changes

act as one pleases

The country will not function as a country.

lewd

be honoured with high official titles

Ancient trees touch the sky.

gilded youth

an evil person fears someone even more evil (idiom); lit. ghosts are afraid of evil too

maintain a feeble existence