be careful of one's time

worthless stuff eg. dirt , dust and chaff

survival or perish

fish in muddy waters

The Changjiang River is generally recognized as a natural moat.

be severe in tone and just in stand(speak sternly out of a sense of justice)

perish promptly

save mankind from the sea of miserable life

inherit the past and usher in the future(to carry on the past heritage and open up the future)

Spring has come and the flowers are in bloom.

wear a deep frown on one's face

be shrewd and deep

pull out a tendon and skin

a fly dashing out its head against the wall--a sure failure

Elaborate

eat,drink,shit and piss(the routine of daily life)

seize time by the forelock

The Changjiang River is known as a natural barrier.

usurp the highest leadership of the party and the power

One's lips and mouth are parched.