| 1. | There is no knowing when he will come . 无法知道他什么时候来。 |
| 2. | There is no knowing but such an accident may happen . 谁能说不会发生这种意外呢? |
| 3. | There is no knowing what may happen tomorrow 谁也不知道明天将发生什么。 |
| 4. | There is no knowing what may happen 未来的事无法预料。 |
| 5. | There are no known safety hazards associated with this material 没有未知安全危险因素与该材料有任何联系。 |
| 6. | There are no known written records to explain their purpose or origin 无人知道记录和解释它们的目的和来源的文献。 |
| 7. | There is no known record to the detriment of the applicant and the employer 申请人及雇主没有任何不利于申请的已知不良纪录; |
| 8. | This is event true when there are no known security issues with a given service 当给定的服务没有已知的安全问题时尤其应该这样。 |
| 9. | No , there is no known relationship between flashes or floaters and any of these problems 不会。这之间目前来讲是没有必然的关系的。 |
| 10. | A : no , there is no known relationship between flashes or floaters and any of these problems 不会。这之间目前来讲是没有必然的关系的。 |