Question

搞不懂的英语翻译,请牛人帮忙，太难了。。。

the nature of social history and lyric poetry are ___, social history always recounting the ___and lyric poetry speaking for unchanging human nature, that timeless essence beyond fashion and economics. 答案的写的是：antithetical 和evanescent(短暂的) 为什么不能填indistinguishable 和unalterable?

Answer 1

the nature of social history and lyric poetry are antithetical, social history always recounting the evanescent and lyric poetry speaking for unchanging human nature, that timeless essence beyond fashion and economics.
社会历史和抒情诗的本质是相互对立的，社会历史总是叙述瞬息即逝的东西，而抒情诗讲述的是不变的人性，是超越了时尚和经济基础的永恒本质。

这是你没有理解文章的本意所致，indistinguishable adj. 不能区别的，不能辨别的；不易察觉的，显然和antithetical 意思完全不同。unalterable 同理。