Knowledge has no limit; Knowledge is infinite; Learning is an endless process;
would rather break than bend; adamant;
clean and fresh; neat and tidy; clean as a pin;
Everything is going well.
feel oneself highly flattered; be heaved with joy;
be extremely cruel and merciless; be cruel to sb; cruel and evil;
A lifetime of military combat.
It describes a person's ability to be calm and collected when encountering special emergency situations.
