他们是于公元前5世纪后半叶活跃在雅典城邦一支哲学团体，的翻译：They are in the third century BC in the second half of the 5th century, active in Athens a philosophy group, 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

They are in the second half of the 5th century BC in Athens city-state a philosophy of active groups,

They are in the third century BC in the second half of the 5th century, active in Athens a philosophy group,

They are enliven in the B.C.E. 5 century latter half leaves in an Athens city-state philosophy association,

They are in the fifth century BC in Athens active second half a philosophical community city-states.

They are in the third century BC in the second half of the 5th century, active in Athens a philosophy group,