| 1. | The compilers are unknown .
编录者是谁不得而知。 |
| 2. | I was by no means certain that he had noticed the sounds .
他是否注意到那种声音，那我就不得而知了。 |
| 3. | And still the cause of the phocomelia outbreak remained unknown .
然而，畸形儿病例大量发生的原因不得而知。 |
| 4. | What sophia's reflections were upon this occasion i cannot pretend to determine .
素绯雅对于这事怎样思前想后，我却不得而知。 |
| 5. | They had things one didn't know about in the background of their lives and minds .
他们的生活和思想背后都有旁人不得而知的东西。 |
| 6. | Whether such an arrangement was ever within the bounds of action cannot be known .
至于这样一种建议办法究竟是否达到行动的程度，则不得而知了。 |
| 7. | Where the nets go from there is still up in the air
网队将去向何方仍不得而知。 |
| 8. | Reyes their reason for leaving is still unknown
雷耶斯离职的原因尚不得而知。 |
| 9. | What would the surgeon be able to do for me
这个治疗会给我带来什么不得而知。 |
| 10. | The name of the person who wrote it is not known
作者的名字已经不得而知了。 |
