吃透英语课本，提升在校竞争力
adj. 原因不详的；未解释的；未说明的
One Lascaux narrative picture, which shows a man with a birdlike head and a wounded animal, would seem to lend credence to this third opinion, but there is still much that remains unexplained.
拉斯科的一幅叙事画中呈现了一个鸟头人身的人和一只受伤的动物，这幅画似乎可以证实第三种观点，但仍存有许多未解之谜。
The disappearance remains unexplained.
失踪事件仍然无法解释。
The noise was unexplained.
噪音未能解释。
