进：前进；退：退却；守：防守，固守。前进可以攻击，后退可以固守。比喻进攻和防守都有主动权
can take the offensive or defensive as one chooses
进(jìn)
可(kě kè)
以(yǐ)
攻(gōng)
()
退(tuì)
守(shǒu)
