The relationship between religion and the state is not an abstruse question of political philosophy.
宗教和国家的关系并不是有关政治哲学的抽象问题。

In ancient India history, the contents are miscellaneous and toilsome, profound, archaic and abstruse.
印度古代史，内容繁杂，深邃古奥，且缺乏原始资料。

He also is met laugh of a person's mind, still Anacreontic, very heavy however, resembled assuming the deal of years of involved and abstruse.
他也会心地笑，依然明朗，却很沉重，像承担了艰涩岁月的份量。