未探测深度的,无法窥探的,未被了解的
unfathomed
adj : situated at or extending to great depth; too deep to have
been sounded or plumbed; "the profound depths of the
sea"; "the dark unfathomed caves of ocean"-Thomas Gray;
"unplumbed depths of the sea"; "remote and unsounded
caverns" [syn: {profound}, {unplumbed}, {unsounded}]