The universal is neither seen nor heard, its existence is only for the mind.

所以普遍是人所不见不闻，只是对于精神而存在。

youdao

Those who have seen and heard it performed will, I trust, bear witness that the harnessing of Indian melodic modes to the service of the drama has proved neither derogatory nor futile.

听过这出音乐剧演唱的人，我相信都会作证说，让印度旋律的形式来为戏剧服务，是既没有贬低其价值也不是徒劳无益的。

youdao

Neither have I seen him recently, nor have I heard from him.

我最近既没见到他，也没收到他的来信。

youdao

Chavez has neither been seen nor heard from, except for "proof-of-life" photos released in mid-February, since submitting to a fourth round of surgery in Cuba on Dec. 11 for an unspecified cancer in the pelvic area.

NPR: Venezuela: Chavez Hit By New, Severe Infection