2. An unexplained death is difficult to come to terms with. 原因不明的死亡是难以接受的。
3. The city's water supply has been cut for unexplained reasons. 城市的供水被莫名其妙地切断了。
4. They realized that the official explanation left facts unexplained. 他们意识到那个对外宣称的解释没有对事实做出解释。
5. 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. 一幅拉斯科岩洞叙事画描绘了一个头部像鸟的人和一只受伤的动物的故事,这似乎证实了第三种观点,但仍有许多未解之谜。