婴儿猝死的现象仍然不可解.The phenomenon of cot death has yet to be explained.那个谜对我们仍然是不可解的.The riddle remains inscrutable to us.证据的重要性是神秘不可解的.This weight of evidence is something mystical and unanalyzable....

“不可解”的英语可以翻译为：insolubility，inapprehension，inscrutability，intangibility ...