" It was bonkers, " they said. " Completely undeliverable."

“这太疯狂了，完全无法实现。”

I did, the letter got returned as undeliverable.

我寄过 但被退回来了 说是无法投递。

Then the wild and distant seas where he rolled his island bulk; the undeliverable, nameless perils of the whale; these, with all the attending marvels of a thousand Patagonian sights and sounds, helped to sway me to my wish.

次，条大鲸里面滚动屿般的身体的荒凉辽阔的大海；和与条大鲸分不开的无可言宣、难以名状的种种惊险；以及沿途巴塔哥尼亚一带见到的听到的无数色之奇，都帮助影响我的意图。