timeless philosophical treatise, but as a dramatic dialogue with a setting,

永恒的哲学专著而撰写的更是作为一部有着设施和演员
a cast of characters and a firm location in time and place.

而且有着固定的时间和地点的戏剧对话
Let's say a little more about that time and place

让我们再多说点儿有关句子中提到的
already indicated in the sentence, "I went down to the Piraeus."

时间和地点的事情 "我往下走到了比雷埃夫斯"
Plato was born in 427,

柏拉图出生于公元前427年
which is four years after the commencement of the Peloponnesian War.

那时伯罗奔尼撒战争已经开始四年了
He was a young man of 23 when the democracy in Athens was defeated.

当雅典的民主政治被击败的时候他才是一位23岁的青年
He was only 28 when the restored democracy

公元前399年当他重建好民主政治时他才28岁
executed his friend and teacher, Socrates, in 399.

这政治处死了对于他亦师亦友的苏格拉底
Almost immediately after the trial of Socrates,

几乎就是在苏格拉底的审判之后
Plato left Athens and traveled extensively throughout the Greek world.

柏拉图离开了雅典周游希腊各国
Upon his return, he established this school at Athens he called the Academy,

他一回来就在雅典建立了他称为学园的学校