Answer to this question will never be known with certainty.

没有一个确定的答案。

youdao

Answer to such question will never be known with certainty.

这类问题从没有确定答案。

youdao

Additionally, the end of the journey must be known with some degree of accuracy.

另外，对旅程的终点也要有一定程度的了解。

youdao

For example, read copies of a group's financial records and be careful of groups with names that sound like well-known charities.

VOA: special.2009.11.02

One painting of Cecilia Gallerani has come to be known as "Lady with an Ermine" because of the small white animal she is holding.

VOA: special.2010.09.15

"To mention an example, we have found that about eighty percent of all genes that are known to be associated with human disease have a counterpart in frogs.

VOA: special.2010.06.29

However, Dr King said the benefits had to be weighed with caution against known adverse effects of drinking alcohol and it would not be advised in some people such as those with liver problems or cancer.

BBC: NEWS | Health | Alcohol 'quickly' cuts heart risk

Armitage said that the trial results are unlikely to be due to the side effects of laropriprant, since the main finding of a lack of benefit is consistent with the AIM-HIGH study and many of the side effects are known to be associated with the use of niacin.

FORBES: HPS2-THRIVE: A 'Disappointing But Clear' Result

Rather, the technique should also be shown to be reliable, with known error rates.

ECONOMIST: Whose body of evidence?