adj.深得無法到達(dá)底部的；莫測高深的；難以了解的

Under the unfathomable sea, life glows both audibly or mutely. 在深湛的海洋,有聲無聲地,生命兀自綻放光彩。

This requires limitless range and unfathomable depth of vision. 這要求有無限深廣的視野。

His feeling was confused and drifting, but deep and unfathomable. 這思緒是散亂而飄浮的，又是幽深而莫測的。

The world is beautiful, in many unfathomable ways. 世界如此美麗，在許多方面深不可測。

He, for some unfathomable reason, wanted to be with me. 他因為某個不得而知的理由，想和我在一起。